Question about Dodge Charger

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1973 charger 400 mag car. headlights weak at idle, and turn sigs. inoperative, headlamps bright and signals work at rpm. new voltage reg, alternator tested good. what am i missing?

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Not getting enough ground!!!

Posted on Sep 05, 2009

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Check your grounds. also just cause regulator is new doesnt mean its good buy one from a reputable parts supplier not a vip or autozone

Posted on Sep 05, 2009

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Does the ECM control the alternator charging amperage/voltage on a 2004 Suzuki aerio? New alternator only charges @12.5. Won't charge enough to keep ahead of necessary power draw.


Some vehicles are fitted with a smart charging system that is designed to prevent the alternator charging during acceleration to free a few horsepower to help.

My experience of these is very limited but there is an ECU that controls them and the battery, charging or ignition light using information from the engine management system.
The alternator generally has an extra plug with about four or five wires which when disconnected render the alternator a standard machine sensed type.

Japanese vehicles used separate voltage regulators longer than most types. You either need experience or a wiring diagram for good fault diagnosis but mostly it is unnecessary to check the charging current of an alternator which bears little significance unless being tested with a graduated load or adjustable carbon pile.

The current output of a healthy alternator is dependent on the terminal voltage of the battery which in turn is dependent on the electrical load placed upon it. Switching on the lights should lower the voltage and increase the alternator output. If the battery is particularly good the voltage won't fall very much and the current won't increase as much as expected...

Measuring the battery voltage with the engine running at about 2000/2500 rpm is sufficient for most purposes. With nothing switched on and a fully charged battery it should be around 14.5 volts and with everything switched on (lights, HRW, heater fan, etc.) a healthy alternator should continue to maintain a voltage above that of a healthy fully charged battery (13.2 volts).

If the voltage isn't maintained on load the charging system, probably the alternator, is faulty and should be independently tested.

Jan 25, 2017 | Suzuki Cars & Trucks

1 Answer

I want to take out the high beem fuse for a 2003 buick regal... I lost the car manual


Two fuses HDLP L fuse #36 15amp & HDLP R fuse #32 15amp ,located in the under hood fuse / relay box. One is for Left - low an high beams an the other is for right side low an high beams . What's wrong , no high beams ?
Headlamps Inoperative - High Beams

1

Did you perform the Lighting System Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the ignition to the OFF position.
  2. Turn the headlamp switch to the HEAD position.
  3. Place the headlamp dimmer switch in the high beam position.
Are the high beam headlamps operating properly?
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
yes Go to Step 3


Is only one high beam headlamp inoperative?
yes Go to Step 7
Go to Step 4

4

Place the headlamp dimmer switch in the flash to pass position.
Do the high beam headlamps operate in the flash to pass position?
Go to Step 13 yes
Go to Step 5 no

5

Place the headlamp dimmer switch in the high beam position.
Does the high beam indicator illuminate?
Go to Step 12
Go to Step 6

6

Test for a high resistance, an open or a short to battery positive voltage in the high beam signal circuit of the headlamp dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 13

7

  1. Disconnect the inoperative headlamp.
  2. Using a test lamp connected to ground, probe the battery positive voltage circuit of the inoperative high beam headlamp.
Does the test lamp illuminate?
Go to Step 8
Go to Step 9

8

Connect a test lamp between the headlamp high beam signal circuit and the battery positive voltage circuit of the inoperative high beam headlamp.
Does the test lamp illuminate?
Go to Step 11
Go to Step 10

9

Test for a high resistance or an open in the battery positive voltage circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 12

10

Test for a high resistance or an open in the headlamp high beam signal circuit of the inoperative high beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 12

11

Inspect for poor connections at the harness connector of the inoperative headlamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 14

12

Inspect for poor connections at the harness connector of the fuse block - underhood. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 15

13

Inspect for poor connections at the harness connector of the headlamp dimmer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 17
Go to Step 16

14

Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement .
Did you complete the repair?
Go to Step 17
--

15

Replace the fuse block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.
Did you complete the repair?
Go to Step 17
--

16

Replace the headlamp dimmer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.
Did you complete the repair?
Go to Step 17
--

17

Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2

Jan 07, 2016 | Buick Cars & Trucks

2 Answers

When air conditioner clutch engages it pulls down all vehicle voltage and belt and clutch start to slip


belt worn, loose or idler pulley weak --compressor clutch binding,moisture in system ,compressor internal damage

Jul 19, 2015 | 2000 Jeep Grand Cherokee

2 Answers

Voltage drop. When in parked I rev up the engine, when it comes down, the voltage drops from 14 to 10, for about 5 secs. I think the truck will cut off but it immediately comes back up to 14.


If the alternator is weak, and you have accessories like the headlights or blower motor running, and the RPM drops below 600, the voltage could be below 12. It would depend on the load, RPM, and several other factors.

Feb 12, 2014 | 2000 GMC Yukon XL

1 Answer

Oldsmobile intrigue problems


The switch is bad >
Each headlamp is individually fused so that battery voltage is applied to the individual lamps at all times through circuit 1640 for the LH headlamps and through circuit 1740 for the RH headlamps. When the headlamp switch is in HEAD, the ground is applied directly to headlamp switch through circuit 1750. When the headlamp switch is placed in LOW, ground is applied to the low beam headlamps through circuit 1201. When the headlamp switch is placed in HIGH, ground is applied to the high beam lamps and to the high beam indicator through circuit 1200. The high beam indicator is fused so that battery voltage is applied at all times through circuit 640.

The box you hear the click in is the daytime running lights control module .
Do you know how to do electrical testing using a DVOM- digital volt ohm meter or a test light ?

Low and High Beams Headlamps Inoperative
Step
Action
Value(s)
Yes
No
1
Was the headlight system check performed?
--
YES - Go to Step 2
NO - Go to Headlight System Check
2
Does flash to pass function normally in the headlight system check?
--
YES - Go to Step 3
NO - Go to Step 7
3
Does the autolamps low and high beam operate normally?
--
YES - Go to Step 4
NO - Go to Step 6
4
Turn the headlamp switch to the Head position and the headlamp dimmer switch to Low position.
Using a test lamp, backprobe between connector C201 terminal W and ground.
Is the test lamp on?
--
YES - Go to Step 5
NO - Go to Step 6
5
Repair poor connection or open in circuit 1750 between connector C201 terminal W and S283.
Is the repair complete?
--
Go to Headlight System Check
--
6
Replace the headlamp switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle for service procedure.
Is the repair complete?
--
Go to Headlight System Check
7
Repair poor connection or open in circuit 1750 between S283 and ground.
Is the repair complete?
--
Go to Headlight System Check

May 13, 2017 | Cars & Trucks

2 Answers

Turn signals come and go


if you meen come and go by nothing happens when you use turn sig lever up or down you dont get green arrow light on dash or hear sound sounds like gms multifunction switch its behind steering wheel and works wipers,turn sigs,brights and headlights on some models hazzards too thier pricey too

Aug 23, 2012 | 2002 Pontiac Grand Am

1 Answer

1997 Mercury villager left headlight doesn't work.


go here. we can help you. Also, did you check the headlamp relay in the box under the hood? One relay is in box in front of battery, other is in narrow box along passenger side fender under the hood. swap left & rt headlamp relays to see if it changes.

http://groups.yahoo.com/group/villagerquest/

Jul 13, 2009 | 1995 Mercury Villager

2 Answers

Charging Problem 1993 toyota pickup


Hello! I too am PA St Insp Mechanic.

Here are some suggestions:

Note that the Fuel injection computer starts to cease to work properly at 10.5 VDC. This leads me to a voltage issue. You mentioning that the veh has bright headlamps may be consuming more power than the alt can deliver, with the heater, the lights and the other "normal" draws.

Test the alt output with a voltmeter, plus to plus, minus to minus, at the battery. You should read 14 + volts with all of the above mentioned accessories on, at idle. 11-12 volts = bad alternator, unless the belt is real slipping bad. 14.4 is the spec.

Also, the Voltage Regulator in inside the alternator.

Glad to provide assistance to you; please rate my help with a FixYa, I would be very grateful.

Jan 22, 2009 | 1993 Toyota Pickup

1 Answer

Electrical System Problems in '02 F250 Diesel


Does the truck have daytime driving lights ? Sounds like a short , maybe the switch inside the steering column . Turn signal , wiper , headlamp dimmer ,or multifuction switch . Without testing this is just a guess . Find a wiring diagram at http://www.bbbind.com/free_tsb.html there free , get yourself a DVOM - digital volt ohm meter an test the B+ volt into an out of the switch . moving dimmer from low to high an turning on the turn signals etc.... Suggest you watch a few videos on youtube for automotive electrical testing , how to use a wiring diagram etc.... disconnect circuits at the mutifunction switch .

Measure the resistance between multifunction switch C202a pin 44, circuit 44 (LB), harness side, and electronic flasher connector pin 1, circuit 44 (LB), harness side; and between multifunction switch C202a pin 44, circuit 44 (LB), harness side, and ground.
  • Is the resistance less than 5 ohms between the multifunction switch and the electronic flasher, and greater than 10,000 ohms between the multifunction switch and ground?

Carry out the multifunction switch component test; Refer to Wiring Diagrams Cell 149 for schematic and connector information.
.

  • Is the multifunction switch OK?
Yes INSTALL a new electronic flasher. TEST the system for normal operation.

No INSTALL a new multifunction switch; REFER to Section 211-05 . TEST the system for normal operation.
Testing the electrical circuits of all the system not functioning properly is how you go about finding the problem .

  1. Visually inspect the following for obvious signs of mechanical and electrical damage.

    Visual Inspection Chart Mechanical Electrical
    • Headlamp switch
    • Multifunction switch
    • Battery junction box (BJB) fuse 3 (30A)
    • Central junction box (CJB) fuse:
      • 5 (15A)
      • 16 (20A)
      • 26 (10A)
      • 28 (10A)
    • Wiring harness
    • Loose or corroded connections
    • Headlamp relay (if equipped)
    • DRL relay No. 2 (if equipped)
    • DRL jumper (if equipped)
    • RAP module (if equipped)
    • Central security module (if equipped)
    • Light sensor amplifier (if equipped)
    • Headlamp bulb
  1. If the concern is not visually evident, determine the symptom and proceed to the Symptom Chart.

Symptom Chart
NOTE: Refer to the Wiring Diagrams for connector numbers stated in the pinpoint test.
Symptom Chart Condition Possible Sources Action
  • Both headlamps are inoperative
  • Battery junction box (BJB) fuse 3 (30A).
  • Headlamp switch.
  • Circuitry.
  • Multifunction switch.
  • GO to Pinpoint Test A .
  • The low beams are inoperative
  • Central junction box (CJB).
  • Circuitry.
  • GO to Pinpoint Test B .
  • The high beams are inoperative
  • CJB fuse 16 (20A).
  • Circuitry.
  • CJB.
  • Multifunction switch.
  • GO to Pinpoint Test C .
  • One low beam headlamp is inoperative
  • CJB fuses:
    • 28 (10A) (LH).
    • 26 (10A) (RH).
  • Headlamp bulb.
  • Circuitry.
  • GO to Pinpoint Test D .
  • One high beam headlamp is inoperative
  • Headlamp bulb.
  • Circuitry.
  • GO to Pinpoint Test E .
  • The headlamps are on continuously
  • Headlamp switch.
  • Circuitry.
  • Multifunction switch.
  • Daytime running lamp (DRL) relay No. 2 (if equipped).
  • DRL jumper (if equipped).
  • Headlamp relay (if equipped).
  • Remote anti-theft personality (RAP) module (if equipped).
  • Central security module (if equipped)
  • Light sensor amplifier (if equipped).
  • GO to Pinpoint Test F .
  • The high and low beam headlamp is inoperative on one side
  • Circuitry.
  • REPAIR circuit 57 (BK). TEST the system for normal operation.
  • The flash-to-pass feature is inoperative
  • Multifunction switch.
  • CHECK circuit 196 (DB/OG) for an open. REPAIR if necessary. If OK, INSTALL a new multifunction switch; REFER to Section 211-05 . TEST the system for normal operation.

Mar 07, 2017 | 2002 Ford F250 Super Duty SuperCab

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