Electric Fans not turning on

[thedugan]

So I have my fans all wired up and they are suppose to be kicked off by my Accel DFI ECM when it hits 205. Car hit 205 and no fans.

I changed it to turn on at 160 but the same problem. Wiring looks right so where do I start?

Its a Northern Radiator with dual spahl fans. Basically wired as per the Spahl instructions, the ground is triggered by the ecm.

[Vegas69]

Verify your ecm is providing the ground. You can use a test light hooked to the positive. Also make sure the ecm engine temp reading is in line with the actual engine temp.

[BonzoHansen]

Doug, is this run with relays or a controller? Verify you have hot at the relays. You should be able to ground the trigger lead down to start the fans. Then you've ruled out relays & power.