Head light will not work~

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Oct 3, 2006 | 05:32 PM

MitchF_V10

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Headlight will not work~

Ok, similar problem. My friend has a 77 F150 and we can't get the lights to work from day to day. So I replaced the headlight switch because the old one was arcing. The switch worked until I installed it back into the dash. Now the turn signals don't work at all and I don't know where to start on this whole ordeal. So basically from this post alot of this is just ground problems? It seems too simple? And I don't know the first thing about turn signals. Just please enlighten me. Also what color wires do what on the 77 light switch?

Last edited by IB Tim; Oct 3, 2006 at 06:14 PM.

Oct 3, 2006 | 06:05 PM

Mil1ion

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Mitch,Welcome to the site .

What do you mean by arcing ?

The Ford exterior lighting system is quite comprehensive and requires a methodical trouble-shooting procedure.

Can you tell us exactly what works and what doesn't right now?

America is full of inferior electrical auto parts these days.

Just cause somehting is new doesn't make is good.

EDIT:Thanks Tim,

Last edited by Mil1ion; Oct 3, 2006 at 07:02 PM.

Oct 3, 2006 | 06:11 PM

IB Tim

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From: 3rd Rock

Split...enjoy

Oct 3, 2006 | 09:19 PM

MitchF_V10

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Ok, at first the headlights worked then they started to flicker. The parking lamps or side lamps did not work even though we replaced the bulbs. The turn signals also worked for a while but now they do not operate. The running lights are also out on this truck but the brake lights work.

Mitch

Oct 4, 2006 | 10:54 AM

Mil1ion

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Okay, I suspest an inferior switch.

Try an find a Motorcraft switch.

The Ford headlight system is inferior because the main power to run the headlights goes thru the switch with circuit breakers...once they heat up and weaken..the flickering lights show up.

Flickering can also be because of bad grounds.
Loose connections
Bad ground on Voltage Regulator
Floor Dimmer switch is shorting out.

Check all the connections everywhere to make sure all connections are clean & secure.

Check grounds for good contact.

If you still have a problem after that ,we'll do a step by step T/S.

Oct 4, 2006 | 11:02 PM

Vinford

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From: Williams Lake B.C.

Ive had 2 diffrent 79 Fords with similar problems.
Both times it was the high beam dimmer switch on the floor!

Oct 4, 2006 | 11:47 PM

Matts72

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From: Montana Territory

Thats what I was going to suggest as well, the problems is that a lot of these trucks had/have rubber floor mats which are rust magnets and eat away at that floor switch. The best thing to do is to smear some RTV sealant or silicone caulking in the back of that switch and make it weathertight. I used heat shrink wire connectors too further the weathertight factor. Good Luck!