[tweed]

ok im back alredy.i dont have a air compressor for air but the prob is my cooling fan.the guy i got the car from wired it so when i need to cool the temp down i just cut the air on.prob is that the fan wont come on and the normal air wont blow inside untill its about 3 lines from running hot and even than it wont stay on but a few secs.i check the connection to the fan but other than that i dont know anything else to check.thanks for any help i can get.

[vicrod]

See the attached diagram for the wiring of an electric fan.
The temperature sensor must be coordinated with the thermostat.
Such as the thermostat controls the water temperature in the engine to keep the water from falling below a certain temperature (say 180*).
The temperature sensor and fan keep the water temperature from going too high (say 185*).

vicrod

[tweed]

ok thanks.im gonna check this out.well i dont understand that chart,i need more brains.im wondering if maybe its a censor or thermastat which i replaced last year.i might can run a old toggle switch to the fan that i have in the car but if i have a bad censor or thermostat could that keep my car hot even if i get the fan working?it dont take but less than 1 mile for the car to get overheated,thanks again.

[SSedan64]

If you're running the Fan through a bad Temp Sensor even with a Toggle switch it wont work unless you bypass the Sensor and manually control the Fan.
Here's a simpler diagram, think of the Green bulbs as the Fan>> http://www.classictruckshop.com/club...osch/relay.htm the Relay with terminals marked 87,30,85,86 will prevent overheating the Toggle switch as they can't handle a 30 to 60 Amp Motor start up current or continuous current draw. A Fuse should be installed between Batt & Relay also.

This shows a Dual Fan wiring setup >> wiring diagram for dual fans with Temp Sensor, A/C diagram.

[tweed]

well i traced the wires and the fan went into a wire that was in a plastic casing with other wires.it went from the fan to the firewall at top than i found the prob.the wire is twisted to 2 other wires and the tape that was on it was like burnt or something so i untwist and clean the wires twist back and everything worked.thanks so much for all the help because with out it i wouldnt have traced those wires.you guys are life savers!