Intermittent electrical problem
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Thread: Intermittent electrical problem

  1. #1
    Opeler Site Supporter alolmo's Avatar
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    Intermittent electrical problem

    My 70 GT have a problem, well Iím not sure if itís there today, because it comes and goes. The issue is this: the other day was raining so I had the lights on, heater on, and wipers on. So all of the sudden I noticed that I was out of blinkers, and the oil pressure gauge, along with gas and temperature gauges. So, I checked the fuses and every thing was ok. Parked the car and a few days later all is ok. Whatís going on? Any ideas?
    al olmo
    1970 Opel GT
    Harley Davidson motorcycle 2012 FLHTK

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    Opeler Opel-GT-72's Avatar
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    Sounds like you have a bad ground connection in your controlboard ...

    Looks like that ...



    Renew the wireharness, the cabels are just old.



    Or try to get some extra ground connection, for ex. the speedmeter to carbody ...

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    1971 GT My location CDN OpelNut's Avatar
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    Raining, you say....

    I once had a small leak in the corner of my GT windshield. In the rain, it would drip on my left leg. Once, while driving in the rain it shorted out the whole car... dead.

    You might have something similar going on.
    1971 GT - 2.4 "Legere" Stroker - Weber DCOE45 - Getrag - Compufire - S10 Clutch - Custom Racetec pistons
    1972 Corvette Stingray (Ok, it's the wife's), 1987 CRX Si, 2009 Audi A4 Quattro

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    Southern Red Neck My location BQS4's Avatar
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    Quote Originally Posted by alolmo View Post
    My 70 GT have a problem, well Iím not sure if itís there today, because it comes and goes. The issue is this: the other day was raining so I had the lights on, heater on, and wipers on. So all of the sudden I noticed that I was out of blinkers, and the oil pressure gauge, along with gas and temperature gauges. So, I checked the fuses and every thing was ok. Parked the car and a few days later all is ok. Whatís going on? Any ideas?
    This has been discussed in the alternator upgrade threads on this site. You have to remember, these alts are getting to be 40 years old, and you had a HIGH demand on it that or those days. you might want to search the site for the alt upgrades, and consider one. There's a 66amp (GTs were 35 stock) to a simple, almost bolt on, 105 amp upgrade that the alt makes power from the get-go.
    "Yes, I do have a rifle rack in my Sportwagon"

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    Opeler Site Supporter alolmo's Avatar
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    Yes, actually I think I have to do both The wiring in the control panel and the alternator upgrade, I had some issues in the past with some switches and I put it in the back burner; and I do have the original alternator, so is time. Thanks for taking the time.
    al olmo
    1970 Opel GT
    Harley Davidson motorcycle 2012 FLHTK

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    Opeler My location kent's Avatar
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    Quote Originally Posted by Opel-GT-72 View Post
    Sounds like you have a bad ground connection in your controlboard ...

    Looks like that ...



    Renew the wireharness, the cabels are just old.



    Or try to get some extra ground connection, for ex. the speedmeter to carbody ...
    What did you do with the grounds that attached to the speedo?

  9. #7
    New/Old Owner 1973 GT My location JimVonBaden's Avatar
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    Quote Originally Posted by kent View Post
    What did you do with the grounds that attached to the speedo?
    Looks like he bussed the grounds all together. Very nice work too!

    Jim

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