Ok I'm going to be wiring up a fan switch on my 3.1L V6, My setup is going to involve the wire that goes from the Fan relay to the ECM. The way it works on my car is the ECM grounds the FAN relay to Run the fan. I want to add a 2nd Grond using a wire and a switch to ground the fan relay in front of the ECM but leave the ECM connect so that it can ground the FAN for the A/C. My question is will this hurt the computer and will it work.

 

do a search... it was explained to me about 2 weeks ago.

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1989 Firebird
2.8 v6, t5 swapped in

Ram Hi-po clutch, Cold Air, 1.6 rockers,Lakewood LCA's, Lakewood Lift bars, Wonder Bar, 3" y-pipe, Random Tech Cat, 3" I-pipe, Flowmasters, MSd 6a, MSD Coil, Accel 8.8 wires, Auto Meter Gauges (Water, Clock, Fuel Pressure, and 5" Sport Comp Tach)TB Bypass, 4th Gen Seats

Coming for my v6:
Panhard Bar, 4thgen front seats, Nitrous, Line Lock, Posi, Spohn Torque Arm & Subframe connnectors

"I'd rather run last in a full out race, than to NOT have run at all"
#3 Forever

 

I don't need it explained just want to know if grounding it ahead of the computer will hurt the computer any,,,, I say no but want to get a 2nd opionion.