Question about Chevrolet 1500

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If I hook up a wire direct to the battery they work, tried replacing the switch and the headlights still won't come on. Please help me get my lights working properly again.

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Most modern cars have a relay in the fuesbox to operate the headlights. Check your owners manual for location of the headlight relay and try listening to it when turning on the lights. It should make a click as you turn on the lights if working properly. if not, replace relay.

Posted on Aug 22, 2010


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Peter From your comment I take it you have neither high nor low beam in both lights. If this is so check the fuses inside the interior of the car and under the hood. There may also be headlight relays that you can easily check by finding the same part number relay for another system of your car and swapping them if it works the you know you need to replace the relay if it doesn't then you need to do a little more work. Take a headlight out and get two jumper wires and hook the headlight directly to the battery if it works test the other light also. If both lights work then you know you have a wiring problem and the first place I would look is the light switch. If it is easy to get to I would chek it before I pulled the headlights out. A lot les trouble and if it works you know you are headed in the right direction anyway.. If after all the testing you still haven't found an obvious problem then you will have to troubleshoot the wires from the switch relays, etc to the headlight to find out where you are losing power. it could be something as simple as the ground wire for the lights being pulled loose because the battery wasn't bolted down and slid when you hotrodded it around the corrner trying to impress las chicas. Headlights are usually simple setups so if you don't find an easy fix from these tips then down load the manual for free and look at the wiring schematic. people freak out when you mention working with electricity but just thing of it as water flowing in a water hose. If there is a break in the hose because it rubbed against something sharp or hot then you loose the water there(electricity) if you have a kink in the hose the water can't get through. Same thing with electricity if you have a lot of corrosion or a bad connection the electricity can't get through. Try it you can do this keep me posted as to what you try and I will keep checking back to help you along.

Mar 24, 2014

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1 Answer

1998 GMC Safari van won't start.

Check your switch that runs to your aternator.make sure is grounded .if not get a sand paper and sand it down.also check the switch that plugs in to the alternator.

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check your negtive wire from battery to ground ,in other words, to body of vechile.

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1 Answer

High beam headlights stuck on replaced switch same problem

It can be issue with headlight switch,but as its already been replaced.Try disconnecting high beam headlight wiring from headlight assembly and reconnect direct external wire from headlight switch to headlight assembly,then by switch see if headlight is getting off and turning on or not.
See below related help links,similar to your issue.Click the link below:----
Only high beams work but head lights not working on Ford F350?

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---------- Working of Headlight switch? ----------

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these will help.

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Turn signal and headlights wired together

"...headlights are hooked directly to the battery" suggests that a previous owner had issues and wired it that way.
The solution is put the circuit (not necessarily the original wiring) back to the factory state.

What's probably happened is a bad ground for the headlight assemblies somewhere. It may also be that a short developed in the wiring harness, a not uncommon problem with many makes.

What you (or your mechanic) need is the schematic to
a) disconnect the previous owner's work; then
b) trace the headlight/signal control circuits though the relays to the headlights and signals; then
c) rebuild / repair as needed.

This can be a lengthy process, be prepared to pay forthe work.

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I have a 94 Honda Civic EX, and the right low beam headlight does not work. The bulb was bad, and I replace it, but still didn't work. The high beam works, and I can hook the low beam connector to the...

there are fuses for each light, high and lo beam. the grounds are grounded at all times, I dont know what you mean by open seeking. its wired like every other car. Right low beam is fuse 21 Red/White wire should be hot if fuse is good. I dont know what you mean by hooking low beam connector to battery? check fuses.

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1 Answer

Turn switch is broke and rigged to work and my dash lights as well as tail lights dont work when headlights are on. trying to find which wire is the dash/tail lights

buy a new switch or used switch for the vehical other wise hook up a toggle switch to a power for headlights and use the switch for other lights if you wanna keep it rigged but i would just replace the switch hope this helps you =check fuses=

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1988 Dodge Omni. I have no park lights or dash lights. I have replaced the fuse multiple times. I have the Chilton's and have traced the hot wire from the headlight switch to the battery with no errors...

then the short is between the battery and switch. so take a test light and hook it on the positive battery cable and the other end to the wire going to the headlight switch (with switch disconnected) if the light is on, start pulling on the harness until it flickers and that will show where the short may be. If the light is off, then wiggle the harness until the light flickers, then find it. either way, you will find it.

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you need to replace the column switch. it has bad contacts where the headlights come on at.

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After market radio wires causes light issue with light switch

check your ground on the radio......... the feed from the lights will test as a ground and the radio will use this as a circuit and turn on the lights. been there done that what a nightmare

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