I have a Lincoln elecrtric fan installed in my 48 GMC.

The fan pulls aprox. 40 amps on low speed & 80 on high.I will use one 40 amp relay for low speed & 2 40 amp relays wired in parallel for high speed.

I have been trying to find 40 amp relays w/a diode to prevent spikes.

If anyone has a sorce for these relays please let me know.

Thanks Don