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Old 05-22-2005, 11:25 AM
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ford wiring problem

Does anyone know where online to find detailed wiring diagrams for an 89 mustang. Im having trouble fixing my hi-beams and I think I found the problem. There is a loose connector under the dash with one of the wires for the high-beams running into it. It seems like its supposed to plug into something but theres nothing there, so i think there might be a relay or something missing. I need to find a detailed diagram (better then Chilton's) to find out if something is missing. Thanks for the help.

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Old 05-22-2005, 06:20 PM
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Library

Doc here,

The Best place to get a FACTORY manual for your car, (not Haynes or Chilton) Is Your local MAIN library Reference Desk.

Ask for the Factory MANUAL from Ford (The one's the dealer's use..)..They Should Have these, and If not, should be able to outsource them for you in a few days.

The Downside is most Library's don't release reference material outside the library...bring lot's of copier change!

Doc
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Old 05-22-2005, 07:46 PM
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Thanks Doc, didnt think of checking the library, i think they just have chiltons/hayes but its worth a try. I can always ask them if they can get it from another library if they dont.
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Old 05-23-2005, 05:18 PM
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Library

Doc here,

Make sure it's the MAIN library for the County, They have typically more resources than the local city library's...

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Old 05-23-2005, 07:01 PM
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Well i went to the local library today (county library is a 1/2 hour drive ) they didn't have the factory manual, which i didn't think they would. I did however take out the Haynes manual they had and its 100% better then Chilton's. They have much better wiring diagrams in the back so im going to work on it some more tomorrow. If I cant get it fixed I may dig this post up for some more help.

Thanks again.
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Old 05-23-2005, 09:08 PM
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You might indeed have wiring troubles but you should know a prime trouble spot is the headlight switch itself. They do give a lot of people trouble, particularly if you have a GT with foglights.
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Old 05-24-2005, 08:57 PM
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Quote:
Originally Posted by GypsyR
You might indeed have wiring troubles but you should know a prime trouble spot is the headlight switch itself. They do give a lot of people trouble, particularly if you have a GT with foglights.
I did check the headlight switch originally and it seemed to check out ok but im going to give it another check because thats seems the only thing left when the problem could lie. Yes it is a GT with fogs, but the fog lights are controlled by a totally different switch.
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Old 05-30-2005, 11:48 PM
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How did you check the headlight switch without noticing the foglight switch is made integral to it? 100's of people have had this problem to the point where you can't find a "GT" headlight switch in a junkyard. I seem to remember on a Mustang forum seeing a popular fix of rewiring the foglights with an aftermarket relay to help take the load off the replacement headlight switch. Worth looking for, I'm sure. It makes sense because LX cars have the exact same headlight switch but no foglights, and none of their owners are complaining.
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Old 05-31-2005, 02:18 AM
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Switch

Doc here,

The only way to be sure the switch is functioning, is pull it out of the car, get an ohm meter and set it for R x 1 Scale...

Find the center wipers (movable contacts) Terminals on the switch, and ohm between them , both sides...

In off, you should read infinate...or no readings...turn the switch on, and you should get 000 (or day~um close to it) IF you have those readings...It's all good..

If It's infinite regardless of position ... It's hosed...replace the switch..

AND take the relay advice on the frog lamps...it will ease the current draw through an already under~designed switch..

Doc
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