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08-16-2019, 03:38 PM
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#1 |
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Registered User
Join Date: Mar 2015
Location: Lone Star, TX
Posts: 26
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65 c10 overdrive help
Quick question about the overdrive relay. I can't get my relay to actually operate without external power. Schematics say that power should come from the ACC on Ignition. I'm only getting 6 volts. When I bypass and run a wire from batter to relay it works and my overdrive is alive again. Thoughts? First instanct is that I have a bad ignition switch. This switch DOES crank the truck very well. Thanks for the posts.
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08-16-2019, 07:21 PM
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#2 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: 65 c10 overdrive help
Grounds or the power wire to the relay is deteriorating ?
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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08-16-2019, 07:57 PM
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#3 |
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Registered User
Join Date: Mar 2015
Location: Lone Star, TX
Posts: 26
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Re: 65 c10 overdrive help
If I had to guess, the power wire would be the problem. There is only one wire going from the ignition switch to the overdrive relay. This is a factory original truck. Overdrive hasn't been used since Nov '76.
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08-17-2019, 06:40 PM
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#4 |
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Registered User
Join Date: Mar 2015
Location: Lone Star, TX
Posts: 26
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Re: 65 c10 overdrive help
See what you think of this. I traced the power wire back to the fuse box. Any ideas or suggestions?
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08-17-2019, 09:00 PM
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#5 |
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Senior Member
  
Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,421
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Re: 65 c10 overdrive help
Check the inline fuse and see if the contact points are rusty. It's the white tube looking thing on the green wire
__________________
Christian Carpenter 1963 C10 - Frankentruck 283, 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
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