Question about 1991 Toyota Pickup

2 Answers

Electrical problem: repeated blown fuse on turn signal-dash light circuit. Note: tapped in to left rear light assemblage to serve towed trailer lights. Once had rear light failure/blown fuse, possibly caused by wetness to trailer wiring.

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  • Brian White Sep 07, 2010

    And I check these connections how? That is, how do I know which wires go where:?

  • Brian White Sep 07, 2010

    JZL--So far as I can tell, your suggestions are no help, and the circuit diagrams are irrelevant, since they don't even include the problem circuit.

  • Brian White Sep 07, 2010

    I have repeatedly blown the 10 amp fuse on the dash/turn signal circuit of my 1991 Toyota pickup. Don't know where to go.

  • Brian White Sep 08, 2010

    But, this problem happens when I'm not attached to a trailer. . .

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  • Master
  • 2,926 Answers

Your not blowing fuses because of wet or damp conditions, your blowing fuses because the trailer lights are drawing to much Ampere in the circuit. The correct and best way to install a trailer light kit is with a Plug-In-Simple trailer wiring kit. It can withstand up to four amps, and has a solid state circuit board that will control the lights when activated. You can pick these kits up at any well supplied auto supply store. It has a plug that connects to the factory rear light socket, and also has a plug for your trailer connection. No splicing is required and it takes about ten minutes to install. I have these on my vehicle and never had a problem since.

Posted on Sep 08, 2010

  • GetMeOttaHere Sep 08, 2010

    Then you have a hot lead 12 volt wire that is shorted to ground. This is not real easy but take out the light sockets and check them for a bad connection. If this is not the case, perhaps you have a hot lead wired directly to ground vs positive. Remove your wiring, and with a test light check each wire.

    1. with the tail lights on, the test light will light when you find that hot lead

    2. with the turn signals on, the test light will light and flash when you find the left or right hot lead.

    Your going to have to isolate the circuit to resolve. The test light method works great, and will also tell you what color wire is for what. Rule of thumb, any wire (in most cases) that is a solid color with a black stripe is ground....in most cases.

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  • Toyota Master
  • 17,970 Answers

I suggtes check all the wire connections for any loss wires or ground. Check the harnesses for any corrosion shows. Keep in mind that, while you dont solve it, the fuse is blow and blow again.

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Posted on Sep 07, 2010

  • ZJ Limited
    ZJ Limited Sep 07, 2010

    All trailers will need brake lights and turn signals as well as tail
    lights and side marker lights. Most states require extra marker lights
    for overwide trailers. Also, most states have recently required back-up
    lights for trailers, and most trailer manufacturers have been building
    trailers with back-up lights for several years.

    Determine the
    equipment on your trailer and buy the wiring kit necessary. The kit will
    contain all the wires needed, plus a plug adapter set which included
    the female plug, mounted on the bumper or hitch, and the male plug,
    wired into, or plugged into the trailer harness.
    When installing
    the kit, follow the manufacturers instructions. The color coding of the
    wires is usually standard throughout the industry. One point to note:
    some domestic vehicles, and most imported vehicles, have separate turn
    signals. On most domestic vehicles, the brake lights and rear turn
    signals operate with the same bulb. For those vehicles with separate
    turn signals, you can purchase an isolation unit so that the brake
    lights won't blink whenever the turn signals are operated, or, you can
    go to your local electronics supply house and buy four diodes to wire in
    series with the brake and turn signal bulbs. Diodes will isolate the
    brake and turn signals. The choice is yours. The isolation units are
    simple and quick to install, but far more expensive than the diodes. The
    diodes, however, require more work to install properly, since they
    require the cutting of each bulbs wire and soldering in place of the
    diode.




    Use this wiring diagrams like reference guides...







    Fig. 31: Chassis wiring-Pick-Up 1990-95





    Fig. 32: Chassis wiring-Pick-Up 1990-95 continued


    Hope helps.

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Related Questions:

1 Answer

Where is the trailer light fuse


The answer to this question depends on several factors such as: Whether the towbar was a factory fitted unit fitted during
pre-delivery, a genuine brand unit or an aftermarket unit & who, where & when it was fitted...
The majority of towbars & the assosiated wiring out there are simply wired in to the rear tail light circuits such as:
  • Trailer stop lights wired to vehicle stop light circuit in eighther of the rear tail lights.
  • Trailer park lights wired to vehicle park light circuit same side as the stop lights, as above.
  • Trailer number plate lights wired to vehicle park light circuit same side, as above.
  • Trailer reverse lights (if fitted) wired to vehicle reverse light circuit same side, as above.
  • Trailer left hand indicator wired to vehicle left hand indicator light circuit
  • Trailer right hand indicator wired to vehicle right hand indicator light circuit.
This means that if fitted in this manner (as the majority are) the corrosponding vehicle light fuse will affect the trailer lights unless the is an inline fuse fitted to each single circuit (which cld be blown). This is very uncommon & wld be a costly way to do it...

In some more modern cars that came from the factory (not the dealership ie. pre-delivery) with the tow bar fitted as standard equipment it is possible that there cld be a sepparate little fuse box or section in the main fuse box (the position of the fuse box/es shld be in your owners manual usually Under the bonnet, under the dash or behind font foot kick panels, & if you dont have an owners manual for your vehicle they are usually available to buy an aftermarket version or these days on the internet & often downloadable for free or @ a small charge).

All the best & I hope this is of some help...


Referances: Me, I am an auto mechanic.

Jul 01, 2014 | 2006 Jeep Grand Cherokee

1 Answer

2003 Dodge Dakota Quad Cab with factory towing package and trailer wiring to a 7 pin socket. Turn signal, brake lights, trailer brakes and battery charger all work fine. No running lights. Checked for...


The trailer plug wiring just taps into the truck harness to the rear lights so if the truck lights work, the problem is in the wiring, not a fuse.

Aug 13, 2013 | 2003 Dodge Dakota Club Cab

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2003 Yukon XL Denali Trailer Light Problems


Lighting control module ? ?????? Hazard / flasher module ! Now ( there''s not even an electrical signal where the fuse plugs into the interior fuse panel.) What FUSE ??????

Stop Lamps
The STOP LP 25 A fuse in the underhood fuse block supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to both the STOP 15 A fuse and the CHMSL 10 A fuse in the I/P fuse block, and to the turn signal/hazard module. The turn signal/hazard module then supplies voltage to both of the trailer rear turn/stop lamp supply voltage circuits. The voltage from the CHMSL 10 A fuse is to the center high mounted stop lamp (CHMSL) and the trailer jumper harness. The voltage from the STOP 15 A fuse is to the stop lamps, throttle actuator control (TAC) module, and the cruise control.
Backup Lamps
The backup lamp request signal is sent from the powertrain control module (PCM) to the body control module (BCM) on the Class 2 message system. This signal is based on the park neutral position (PNP) switch signal. The BCM supplies voltage on the backup lamp supply voltage circuit to the backup lamps and to the automatic day/night mirror. Voltage for the courtesy lamp supply voltage circuit and backup lamp supply voltage circuit is from the TBC B fuse in the instrument panel fuse block directly through the BCM to these circuits. A short to ground on either of these circuits will open the fuse. The backup lamps are grounded at G401.
For trailer wiring, a separate backup lamp circuit is connected through the underhood fuse block from the TRLR B/U 10 A fuse to the trailer wiring harness.
Turn Signal/Hazard Lamps
The IGN E 10 A fuse in the underhood fuse block supplies battery positive voltage to the turn signal/hazard switch assembly. The FLASH 25 A fuse in the I/P fuse block supplies battery positive voltage to the turn signal/flasher module and ground is supplied at G200. When the turn signal switch is placed in either the left or right position, a voltage signal is completed from the turn signal switch to the turn sign/flasher module. When the hazard flasher switch is activated, a ground signal is completed from the turn signal/hazard switch to the turn sign/flasher module. The turn sign/flasher module then sends an on-off voltage signal through the LT TRLR, RT TRLR, LT TURN or RT TURN 10 A fuses in the I/P fuse block to the appropriate turn signal or to all 4 fuses for hazard operation. The instrument panel cluster (IPC) indicators receive voltage from the LT TURN and RT TURN fuses as well as the DDM/PDM for the mirror turn signals. The DDM/PDM has no function or control of the mirror turn signals other that a pass through connection for the circuits. The audio chime is also activated when the turn signals are on. When the hazard switch is pressed, all turn signal lamps will flash including both IPC turn indicators. The front turn signals are grounded at G100. The rear turn signals are grounded at G401. The Mirror turn signals are grounded by the DDM/PDM.

Do you know how to do automotive electrical circuit testing with a test light or volt meter ? How to read an use a wiring diagram to pin point testing points . ( connectors , fuse locations etc... ) How to use a power flow chart ? Here is a site for just such info .

http://www.bbbind.com/free_tsb.html Enter vehicle info . year , make , model an engine size . System click lighting , subsystem exterior lighting . Second diagram shows trailer wiring .
Electric Testing Techniques You Need to Know

Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

CHEVROLET 2007 SILVERADO TRAILER LIGHT TROUBLESHOOTING


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1 Answer

No signal on trailer left turn/brake light??


probably a blown fuse. in trucks with trailer packages the trailer lights usually have their own fuses. either in the under hood fuse block or possibly under the dash. if it's blown replace it, if it blows again check for a short in the trailer wiring.

Dec 24, 2010 | 2004 Chevrolet Silverado 2500HD

7 Answers

2003 Dodge Ram 3500 left turn signal problems / trailer


Well let me shed some light on this issue. I have the same problem. Trailer connection from truck does not have power to left turn signal and left brake light. I just got back from the dealership and $100.00 labor charge. My problem is the TIPM (Fuse Box for short) and FCM (little silver module hooked to the Fuse Box on the left hand side of the fuse box). $910.00 for the parts and Chrysler doesn't have any in stock. 4-6 weeks to maybe fill a back order. I am currently researching an alternative way to fix this issue. I will let you know.

Feb 04, 2010 | 2004 Dodge Ram 2500

4 Answers

I have a 1997 Ford F150 4x4 Supercab Stepside with 5.4L and factory towing package. On the factory trailer wiring plug I am not getting power for turn signals or brake lights. Running lights and brake...


It is a possible option that the relays for the Stop / Turn are having an issue or the fuse in the Engine Mini panel is blown ( page 142 of the 1997 owners manual )

On the 1997/98 MY this is in the aux relay box in between the Engine Compartment fuse panel and the engine mini fuse panel.
9349aa0.jpg

The output of the MFS ( Multifunction switch ) triggers the relays, to use the trailer tow fuse to operate the trailer lamps. The fuse to supply power to the Normally Open contacts on the trailer relays should be hot at all times. You can verify this with the diagram below by metering from pin #3 to pin # 2 [ground for coil] or to another known ground.

These are 1/2 size Ford ISO relays, and can be jumpered to make testing easier ( and with this diagram you can bench test them with a meter to check resistance over the Normally Open contacts, when applying power and ground to the coil ).
3a3e4ca.jpg

I am not 100% sure on the 97/98 MY F-150 about the location of this connector, but the 99-03 have all the wires to the rear of the truck via a connector along the driver's side frame rail, that you can check for ( easiest with the spare lowered )
777e616.jpg

Start with the Fuse in the Engine Mini panel, to see if the 20A fuse is good and work back towards the trailer tow adapter via the relays. I am going with the obvious blown fuse for the Stop/Turn lamps for the trailer.

Dec 11, 2009 | 1997 Ford F150 Regular Cab

1 Answer

I want to tow the jeep and need to know thecorrect


Review this information and links:
- Trailer 4 Way System Diagram
- Accesories and Instructions

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Instructions
1.) Determine a suitable location for mounting the circuit protected converter in an out of the way spot near the left tail lights in the trunk or on the frame rail, if mounted under the towing vehicle.
2.) Ground the white ground wire by placing the ring terminal under an existing screw attached to a clean metal surface or by drilling another 3/32" hole and using one of the self tapping screws provided.
3.) Disconnect the tow vehicle's negative (-) battery cable.
4.) Cut the in-line fuse holder loop wiring.
5.) Using a ring terminal (3/8 inch for top terminal or 1/2 inch for side terminal), attach an in-line fuse holder (with fuse removed) to the positive (+) terminal of the battery.
6.) Route black 12 gauge wire from the fuse holder to the converter passing under or through the vehicle.
Note: When passing the wire through sheet metal always go through an existing grommet, add a grommet or use silicone rubber to insulate the wire from the hole.
7.) Attach 12 gauge wire to the fuse holder with the yellow **** connector.
8.) Reconnect the tow vehicle (-) negative battery cable. Note: See tow vehicle owners manual for any special battery reconnection and instructions.
9.) Determine if the towing vehicle has a 2 wire or 3 wire system.

2 Wire System
  • Has same bulb for stop and turn signals.
  • Some vehicles have a separate bulb for stoplights but also have a combination bulb for turn and stop. These cars should be wired as 2 wire systems, using the wires going to the common bulbs.
  • Note: Attach the crimp on spade terminal provided to the red stop wire and ground it along with the white wire.

3 Wire System
  • Has amber turn signals, separate.
  • Has separate bulbs for stop and turn signals (both red).
  • Note: Attach red wire to tow vehicles brake light circuit.
10.) Using a circuit tester or volt ohm meter (VOM), determine which wire attached to the left taillight assembly is the left turn wire. Attach the units yellow left turn wire to this wire using one of the blue wire taps provided. Determine which wire is the taillight circuit and attach the module's brown tail / license wire to it with a wire tap. Determine which wire is the stop circuit and attach the module's red stop wire to it with a wire tap (for 3 wire systems only, see step 9).
11.) Route the units green right turn wire to the right side of the vehicle. Determine which wire is the right turn circuit and attach the green wire to it with a wire tap.
12.) Install the fuse into fuse holder and test the installation with a circuit light or trailer.
13.) Secure all loose wiring with cable ties.

Testing Procedure
With the ground wire connected and all of the other circuits attached, attach the ground lead of a circuit tester to the exposed ground terminal of the 4-flat end. Activate the tow vehicle left turn, right turn, tail and stop lights one at a time. Probe the three receptacles of the 4-flat end to confirm proper functions. If testing with a trailer, make the proper connections and do the same test as the circuit tester using the trailer lights. If a function on the trailer lights does not work properly, disconnect the trailer lights, turn functions on vehicle off and recheck function with the unit with a circuit tester. Then check the trailer wiring for potential circuit problems.

I hope help you with this (remember rated this help).

Good luck.

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1 Answer

Need wiring diagram for 2001 dodge dakota... trying to hook up connector for towing


moz-screenshot-1.jpg 08-33-93f1.gif CAV CIRCUIT FUNCTION 1 Z13 12BK GROUND 2 B40 12LB TRAILER ELECTRIC BRAKE OUTPUT 3 L76 12BK/OR TAIL LIGHT (Trailer Tow Relay in PDC) 4 A6 12RD/TN* FUSED B(+) (40A, Always Hot, F8 in PDC) 5 L63 16DG/RD LEFT REAR TURN SIGNAL TRAILER TOW 6 L62 16BR/PK RIGHT REAR TURN SIGNAL CONNECTOR 7 L1 16VT/BK BACK-UP LAMP FIGURE 1: 7-Terminal Trailer Tow Connector

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1 Answer

I need a wiring diagram for a 7 pin trailer board plug


Here's one
08-33-93f1.gif CAV CIRCUIT FUNCTION 1 Z13 12BK GROUND 2 B40 12LB TRAILER ELECTRIC BRAKE OUTPUT 3 L76 12BK/OR TAIL LIGHT (Trailer Tow Relay in PDC) 4 A6 12RD/TN* FUSED B(+) (40A, Always Hot, F8 in PDC) 5 L63 16DG/RD LEFT REAR TURN SIGNAL TRAILER TOW 6 L62 16BR/PK RIGHT REAR TURN SIGNAL CONNECTOR 7 L1 16VT/BK BACK-UP LAMP FIGURE 1: 7-Terminal Trailer Tow Connector

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