North American Turbocoupe Organization



Cooling Fans...my fave!
w60 Offline
Senior Member
#1
The PO of my car hard wired the cooling fans to be on all the time and unless it's really hot outside I keep the driver side fan unplugged so the engine gets up to normal temp. Recently it's been hot here in Birmingham and I've had both fans going, and the splice the PO did basically melted and came undone.

In my ideal world I'll get the fans working like they should again, but in the meantime, can some of you who have hardwired your fans let me know how you did it? I think the wire the PO spliced into can't handle the current of both fans very well.

Hopefully, I'll figure out how to attach a photo of the current set up.

[Image: ircm.jpg]
http://www.mycoachonline.com
White 88 TC Auto Trans
White 04 Honda CR/V
Blue 74 Honda Trail 70
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Jeff K Offline
Administrator
#2
Fan power circuits must be wired with 10 ga wire, and with 40 Amp relays. Never run both fans off 1 10 ga power and ground wires and 1 40 A relay. Use separate relays and 10 ga wires (both fused at 30 Amps) for each fan. You can trigger the relay coils from the VPWR circuit if you still want them to run constantly, or with switches in the cockpit.

Even in very hot weather the main (pass side) fan should be able to keep the engine cool under most conditions IF the rest of the cooling sustem is up to snuff.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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w60 Offline
Senior Member
#3
where/what is the VPWR circuit?
http://www.mycoachonline.com
White 88 TC Auto Trans
White 04 Honda CR/V
Blue 74 Honda Trail 70
Reply

Jeff K Offline
Administrator
#4
VPWR is the circuit that powers the PCM, injectors, and various other components via the EEC power relay when the key is in START or RUN. Under the hood all VPWR wires are solid red in color.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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