Question about GMC K1500

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I need to know where to hook the small wire on the positive side of the battery to get current to the electrical system so that my headlights will work on my 1990 GMC 1500 blazer?

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One wire goes to alternator. if there are 3 wires, one might go to fusebox under hood. (big one goes to starter).

Posted on Sep 04, 2010

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Posted on Jan 02, 2017

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1988 Dodge d100 my lights are flickering


It's a battery or ground problem. You mean all of them, headlights, dash lights, or what? The flickering is often caused by a corroded or deteriorated ground point for the lights, less common is a hot wire connection that is loose or not contacted well. Your headlights and front park lamps and any side marker lamps, I think they would all have a common ground, or maybe each side has it's own ground up front there. I'll try to find a wiring diagram for what you need, in the meantime, take off first the negative of the battery and then the positive post (for safety, always remove the negative first and reconnect negative last), clean both battery posts and the end of cables or the clamps that go on the posts. Any corrosion, green or white colored, is not good, and can lead to serious resistance in the connection, and hinder the electrical system. Those connections must be clean and tight, remember positive hooked up first, then deal with the negative post. Your truck is old, subject to rust, better check all your ground connections. The original negative cable had a large ground to the engine block and a smaller wire ground to the body, somewhere grounded in front of the battery to the frame. If rust is an issue, you can always find a better ground point-to clean metal free of paint.

If you know all this and you know the battery connections are clean and tight, then look for the ground point for the flickering lights in question. If you have a voltmeter it is almost essential to the testing or checking of any electrical circuit.

Dec 03, 2015 | Dodge Cars & Trucks

1 Answer

Headlights hood up to positive side of battery


Are you sure? What wire is it? Was there any fog lights installed? Does the headlight switch work right?

Apr 29, 2013 | Nissan Cars & Trucks

2 Answers

WHY PASSENGER SIDE HEADLIGHT BULB ON 2007 YUKON DENALI WILL NOT WORK


Remove plug from light bulb, using 12 volt test light hook up ground to negative side of battery,then touch probe on positive terminal to make sure test light is functional.next- turn lights on and then probe the plug at each terminal- there should be one wire that has power and the test light should light up. If the test light lights up then you need to test the circuit ground for the wiring harness. So remove the test light clamp and put it on the positive post of the battery. Now retest the test light by touching the probe on the negative post on the battery and the test light should light up. Next with the headlights off-probe the other terminals and if there is a good ground in the harness the light will light up- if not then there is an open condition in the headlight harness- a broken wire or a bad system ground.If both tests are performed and either condition does not happen then a wiring schematic will be needed to perform the repair. This is after all fuses are presumed good.

Feb 04, 2013 | 2007 GMC Yukon Denali

1 Answer

My truck had a blown headlight bulb now i replaced it its not working


Would need to know what make , model and year vehicle it is . to Look at a wiring diagram to see where it gets power for that side , connections , splice point's etc... Do you know what a wiring diagram is ? How to use a DVOM - digital volt ohm meter ?
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
How to Use Multimeter to Troubleshoot Common Problems

Electric Testing Techniques You Need to Know

Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model and engine size . Under system click on lighting .Then under subsystem click on headlamps . Click the search button ,then the blue link . Look at the diagram , see where that headlamp gets it B+ voltage . Look an see if the ground is different then the other side . Check power and ground for that side , what's missing ? Good luck !


Aug 09, 2017 | Cars & Trucks

2 Answers

My headlights are flickering and there is a clicking sound. I found a relay that is clicking in the fuse box on the left end of the dash beside the door. when I pull that relay the clicking stops and...


replace the relay and see if it stops, the relay can go like this sometimes and needs replacing. also check the earthing strips from the battery and the shell if it still keeps doing this remove one headlight bulb connection at a time and see if it stop as it could be a faulty bulb.

Jul 10, 2017 | Dodge Dakota Cars & Trucks

1 Answer

How do I change out the head light switch on 1992 geo storm


The headlight switch on this car may be changeable, but are you having a problem with the headlights working at all?

If so, then the following may be helpful:
---
REMOVAL & INSTALLATION Spectrum The headlight control switch is a 3 position, push type switch which is located at the left side of the instrument panel.
  1. Disconnect the negative battery cable. Remove the instrument cluster bezel retaining screw and the bezel.
  2. Disconnect the electrical connectors.
  3. Place the bezel on a bench and remove the 2 nuts securing the headlight control switch.
  4. Remove the headlight control switch.
  5. To install, reverse the removal procedures.
Storm The headlight control switch is located at the left hand side of the instrument panel on the meter hood.
  1. Disconnect the battery negative cable.
  2. Remove the meter hood.
  3. Remove the instrument cluster from the meter hood.
  4. Remove the 2 clips attaching headlight control harness.
  5. Remove the 4 screws attaching the headlight switch to the meter hood.
  6. Disconnect electrical connectors from the switch and remove the switch.
  7. Reverse procedure to install. Connect battery negative cable.
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SWITCHES & RELAYS Switches are used in electrical circuits to control the passage of current. The most common use is to open and close circuits between the battery and the various electric devices in the system. Switches are rated according to the amount of amperage they can handle. If a sufficient amperage rated switch is not used in a circuit, the switch could overload and cause damage. Fig. 1: The underhood fuse and relay panel usually contains fuses, relays, flashers and fusible links tcca6p02.jpg
Some electrical components which require a large amount of current to operate use a special switch called a relay. Since these circuits carry a large amount of current, the thickness of the wire in the circuit is also greater. If this large wire were connected from the load to the control switch, the switch would have to carry the high amperage load and the fairing or dash would be twice as large to accommodate the increased size of the wiring harness. To prevent these problems, a relay is used. Relays are composed of a coil and a set of contacts. When the coil has a current passed though it, a magnetic field is formed and this field causes the contacts to move together, completing the circuit. Most relays are normally open, preventing current from passing through the circuit, but they can take any electrical form depending on the job they are intended to do. Relays can be considered "remote control switches." They allow a smaller current to operate devices that require higher amperages. When a small current operates the coil, a larger current is allowed to pass by the contacts. Some common circuits which may use relays are the horn, headlights, starter, electric fuel pump and other high draw ciruits. Fig. 2: Relays are composed of a coil and a switch. These two components are linked together so that when one operates, the other operates at the same time. The large wires in the circuit are connected from the battery to one side of the relay switch (B+) and from the opposite side of the relay switch to the load (component). Smaller wires are connected from the relay coil to the control switch for the circuit and from the opposite side of the relay coil to ground tcca6g02.gif
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Sep 13, 2010 | 1992 Geo Storm

1 Answer

1987 LINC.LIMO/EXCALIBUR..PROBLEM:2 HEAD LIGHT SWITCHS MELTED ?


OK, if you are to modify the original system to use the Large Excalibur Headlights and you are burning out the headlight switch, I would try to ask the electric shop to put a relay in there that can handle the increased load and have it hooked directly to the battery terminals so that it won't burn out your stock switch which has plastic in it.

Aug 02, 2010 | 1990 Lincoln Continental

1 Answer

Ford au 01 xr6 falcon, engine stopped while driving, now has full power in battery but engine wont turn over


does it clcik? turn on your headlights and try cranking the engine over, if the lights don't dim then your wire to your starter is not recieving power to the starter solnoid. there is a round device monted on the side near the battery that has a wire that goes to the battery and one that goes to the starter then there will be one small wire which actavates the starter take a pair of jumper cables place the car in park turn the key to the run postion hook up one end of the cable to the positive side of the battery and the other end to the small wire if it cranks over it means the wire is not working and will have to be tested for aa bad fuse or a fuseable link. Next hook the cable that is connected to the positive side of the battery and connect it to the other side of the solinoid that goes to the starter if it cranks yo know the solinoid is good if it does not replace the solinoid and that should fix your problem. If it does not crank on the first test replace the solinoid anyway, if it still does not work the starter is bad or loose/ You can remove the starter and take itto autozone and they can test it for free. Hope this helps get you up and going and if it does not post what you find here on the e-mail you recieve. Thanks for your time.

Nov 20, 2009 | 2001 Ford Taurus

1 Answer

Hooking up wires to battery, solenoid, altornater and starter


hi from the uk if you look at startermotor solenoid you will see two large threaded terminals with nuts? and a third small terminal either spade or round terminal ok? now you should see thet one of large terminals already has a metal or braides strap secured to it and the actual startermotor body? LEAVE THIS ALONE the other large terminal is the one you fit the positive+ lead to from battery also there should be another lead to also attach to same terminal this one supplies power for vehicles electrics etc ensure you secure these with nut ok? now the third small spade or post terminal you will hav a thin wire nearby ?this attaches to thisterminal on its own on solenoid this wire is the one that activates starter when ignition is turned to key start position ok? as for interior light not working ? try again when you complete the above also make sure bulb is ok? ps! before you reconnect starter wires ensure the earth/ground lead is disconnected from battery and when reconnecting battery connect positive lead first then the earth lead or if you try other way you will have sparking from pos lead as you try connecting to battery hope this info is clear instructios for you to follow and wish you luck best wishes from england

Nov 26, 2008 | 1991 Ford F150

1 Answer

I have a 1959-1962 Honda C102 Super Cub 50cc Scooter, with electric start, that has a 6 volt system, that I am trying to get running. I have a new 6 volt battery, fixed a lot of wiring problems, and was...


large wire off starter will go to positve battery, the small yellow/red wire should go to the starter solenoid, and the battery should be hooked up like a nornal setup please rate -jeff

Sep 01, 2008 | 1995 Honda Civic

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