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| | | Forums66 Topics128,080 Posts1,055,953 Members48,430 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Dec 2007 Posts: 34 Apprentice | | Apprentice Joined: Dec 2007 Posts: 34 | I am in the middle of installing a painless wiring harness, and also an electric fan with a thermo switch. The fan relay is wired to run on its own however there is a wire on the painless that hooks up to fan relay. my question is do they mean the grey wire on the switch or the orange wire marked ignition? thanks for any help here. Also can I run the ignition wire on the relay to the s terminal on my starter? Is the s hot only when the key is on or only while held to start position? | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | sergent,
I don't know about your painless harness or the wire colors, but am pretty sure that your 'S' terminal is only energized when the key is in START...this pulls the solenoid in and is de-energized when the key is released to RUN.
Stuart | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I,m not familiar with those colors either but you need a wire from the accessory side of the ign. switch to the thermal switch. You can probably pick it up off the fuse panel if it,s not in the haeness. It needs to go through a fuse & 18 gauge is adicate. You need a hot wire to the relay from a junction block or bat. cable term on the starter. It should be 12 gauge & have a fuseable link or breaker. The other wire on the therm. switch goes to the relay & the wire from the fan motor goes to the relay. There should be a ground on the relay. There might be another wire to turn it on if you have A/C. They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: May 2004 Posts: 1,312 'Bolter | | 'Bolter Joined: May 2004 Posts: 1,312 | Give Painless a call / fax them. I found their Tech support department to be really good with questions. | | |
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