Topic: Installed new electric fan N water pump....HELP PL
in Forum: C3 Cooling and Heating Systems
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Was hoping someone can help me get my new electric fan N water pump wired to actually turn on N work? I followed directions but not very well. Neither one would turn on 
I have relays for both and I'm so confused 
..... Thanks for all your help in advance 
I have relays for both and I'm so confused ..... Thanks for all your help in advance
Its a 1975 with a 383 coupe.
Thanks ACE
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I recently installed electric fans - love them by the way.
Not sure what's going on with yours. What is is? I am not sure on the pump - is the fan a toggle or a thermo switch? If its a thermo where did you put it? Try taking the wires from the thermo and grounding them -- the fans should turn on. If they don't turn on with the ground than you have a bad motor. The key is to start eliminating potential problems so that you narrow in on the issue.
Thanks Ghost,
Its a Jeggs fan 16"and a ProForm water pump. I'm not sure where to run wire for battery, I had it hooked to fuse box possibly BAt tab or ing tab. I ran ground to frame, grey wire to thermo sensor in manifold w 195 thermostat. I'm pretty sure it's due to how I had wires run. I also have relays for both and circuit breakers 30 amp for each. I'm just lost, It took me a while to hook up my new gauges also.............
I ran ground to frame, grey wire to thermo sensor in manifold w 195 thermostat. I'm pretty sure it's due to how I had wires run. I also have relays for both and circuit breakers 30 amp for each. I'm just lost, It took me a while to hook up my new gauges also.............Thanks for all your help
Lifetime MemberHOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Wiring for an electric fan will usually be done similar. Here's how mine was run:
Heavy ground wire from fan to frame.
Heavy hot wire from fan to heavy input wire on relay.
Heave output wire from relay to Batt (I ran mine to the starter lug)
14 Ga sensor wire to sensor in intake manifold (sensor supplied with relay)
14 Ga ignition wire run to ignition source from fuse panel.
Good Luck!!
Paul
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Do you have AC? If you do then you may want a manual switch to turn on the fan when the AC is on. If you're in traffic with the AC on and no fan to cool the condenser than your AC system will build up too much pressure and cause problems.
Dave
Lifetime Member #116
Dave's '82 
Thanks guys...I will try this when I get to work on it next.... I don't have AC so it should be a little easier. Thanks again...
I got it working......Thanks guys for all the help Now I just need to put a different thermostat in. I put a 195 temp and fan turns on around 210, will put a 180 or 185 in and should be perfect. Thanks again.
Now I just need to put a different thermostat in. I put a 195 temp and fan turns on around 210, will put a 180 or 185 in and should be perfect. Thanks again.
ACE
Keep in mind it is the setting of the sensor you installed that turns on the fan 210 sounds ok I am not sure other guys with fans could let you know what theirs are set at. a 195 thermostat just means the water temp needs to get to 195degrees before it will open and allow the coolant to flow through the engine.
in Forum: C3 Cooling and Heating Systems
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