Anyone wire Derale fan to Holley Sniper Harness

[jawbreaker]

Just got a 17" Derale fan to help cool my baby better. Looking for input on wiring the fan to the 10-pin harness on the Sniper harness to control it. Any help appreciated.

Thanks,

Jawbreaker

 

[Broncobowsher]

Follow the instructions, use the correct relay. Nothing special about it. Instructions on the Holley are pretty straight forward.

OK, maybe a touch of thinking involved. The coil on the relay will be negative switched. That is the computer controls the grounding of the coil. The positive of the coil goes to +12V. I prefer switched, but it can be the same battery feed that will run the fan. Battery feed to the relay goes to a contact with a little jumper going to one side of the coil.

 

[jawbreaker]

So I figured out the leads for "fan 1" and "fan 2", where do I get the correct relays? Derale does not list them on their website.

 

[ransil]

So I figured out the leads for "fan 1" and "fan 2", where do I get the correct relays? Derale does not list them on their website.

I have these relays for sale
Dick Cepek 700 watt dual relay, I have 4 2 used but were working when I removed,new ones 1 in package 1 loose $15 each used $25 each new

I would put a diodes on them to kick down the feedback to the computer.
buy a spare what ever you buy

i googled it for you
https://www.youtube.com/watch?v=5kjtiY9gxGM

https://electronics.stackexchange.c...a-diode-connected-in-parallel-to-a-relay-coil

https://en.wikipedia.org/wiki/Flyback_diode