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10-23-2010, 08:56 PM | #1 |
Registered User
Join Date: Feb 2009
Location: Overland Park, Kansas
Posts: 134
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O/D relay wiring question
I posted this in the '47-'59 forum, but haven't gotten any responses, so I thought I'd try it here...
I am, what is hopefully, in the final stages of installing a 3-speed transmission with electronic overdrive. The transmission is out of a '55 truck, but I'm putting it in a 1970 C/10. The question I have is regarding the relay. I've acquired a 3-post version out of a F**d, but I'm not sure if it may be what's keeping the transmission from kicking into o/d. It has a connection for the transmission solenoid, kickdown switch, and the battery, but only when the ignition is turned on. I had a 4-post relay, which had an additional connection to the battery permanently, but it was a faulty relay. Bottom line, should the 3-post relay be sufficient to run the transmission? Thanks in advance for your help. Adam |
10-23-2010, 10:22 PM | #2 |
Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,134
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Re: O/D relay wiring question
It all depends on how its wired and Is this the type with a lever on the side ort just a solenoid or solenoid and lever?
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10-24-2010, 03:22 PM | #3 |
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Join Date: Feb 2009
Location: Overland Park, Kansas
Posts: 134
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Re: O/D relay wiring question
Not sure if I understand what you mean by lever? I'm relying on the solenoid (and governor) to engage and disengage the overdrive, and not override it with a lever in the cab. The only thing I'll have in the cab is the pull cable to lockout the overdrive.
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10-25-2010, 09:55 PM | #4 | |
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Join Date: Mar 2003
Location: San Francisco, CA USA
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Re: O/D relay wiring question
Quote:
If I remember correctly, the 4 terminal relays had a fuse clip on them. To test, first make sure you have power at the relay and then ground the throttle switch terminal. Both the relay and the solenoid should click. If the relay turns out to be bad (and they almost never die) you can use an ordinary "cube" relay that you can get at any parts store for cheap. Ray Last edited by raycow; 10-25-2010 at 10:10 PM. |
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10-25-2010, 11:36 PM | #5 |
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Join Date: Feb 2009
Location: Overland Park, Kansas
Posts: 134
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Re: O/D relay wiring question
Thanks for the info raycow. As a follow up, is there a way to test the governor to see if it's okay? And if the governor isn't working, is it possible to take it apart to fix...oh, AND put back together to reinstall?
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10-25-2010, 11:56 PM | #6 | |
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Join Date: Mar 2003
Location: San Francisco, CA USA
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Re: O/D relay wiring question
Quote:
Ray |
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10-26-2010, 12:59 AM | #7 |
Registered User
Join Date: Feb 2009
Location: Overland Park, Kansas
Posts: 134
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Re: O/D relay wiring question
Thanks again Ray.
Adam |
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