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SpriteSpot.com • View topic - electrical troubles

electrical troubles

This forum is for topics and questions specifically related to the second generation cars.

electrical troubles

Postby Sprite White Hope » Tue Nov 15, 2011 5:37 am

I noticed many of the dash components/switches don't work. The tach was working then it quit all of a sudden. The fuel guage read empty and I tapped it and it read full. The headlights don't seem to work. The right turn signal does seem to work. I don' t think the brake lights or running lights work. The ignition switch was bypassed and there is a ignition switch in the dash but the key is stuck in the switch. My questions are: Would it be better to get a non Lucas aftermarket wiring harness and rewire? Is Lucas a bad electrical system or did it just get a bad rap? :lol:
Carl Taylor
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Re: electrical troubles

Postby hoggie » Tue Nov 15, 2011 8:37 am

Your biggest problem is probably poor grounding. Especially the lights. The chassis grounding points get corroded with age and go open. Time to get comfortable with a little sand paper and a volt meter. By the way, I noticed OReilly's has small packets of connector grease at the counter. That would be good to keep the connectors healthy once you get them clean and working.
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Re: electrical troubles

Postby Nick » Tue Nov 15, 2011 2:09 pm

Get a proper ignition switch in the car, and follow the previous post instructions, I use metal pipe cleaners on bullet connections .22 BRASS bore cleaners work well to + sandpaper on other connections. Then Dielectric grease ...and remember that AGC fuses are different then the originals..this is a case of 50 amps not being 50 amps..one is rated at what will blow the fuse..(brit) one is rated at what will carry the current (AGC)...if you put a 50 agc in a 50 brit fuse spot lots of Lucas smoke will result if there is a problem. AGC fuses are roughly 50% higher then the brit...so when it calls for a brit 50..use a 30 agc and it should be about right.
Also if you have had problem circuits that have blown fuses with bullet connectors, look closely at the female side, they have a problem relaxing their tension when overheated. (boy there is a good joke in there somewhere)..in all seriousness, if that has been an issue check the connectors. Attached is a bussman conversion chart.

English Type American Standard Replacement
50 amp AGC 30
35 amp AGC 25
30 amp AGC20
25 amp AGC15
20 amp AGC10
10 amp AGC7.5
5 amp AGC3
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