my second radiator fan dose not come on.the fan works.do i change the relay or the sensor in the radiator?this is all original equipment.thanks!
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What would I do?
1) Check that fans spin by hand without effort(ie is it seized or blocked?)
2) If yes, look for any obvious damage to wiring
3) if no, unhook positive wire from fan and run a jumper to the battery
4)Still no joy - check ground
5) If running a jumper solves the problem, then get a voltmeter and start tracing the wiring to see where it "goes bad".
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Charlie McCall
1985 DeTomaso Pantera GT5-S #9375
"Raising Pantera Awareness across Europe"
http://briefcase.yahoo.com/gt5s_1985
1) Check that fans spin by hand without effort(ie is it seized or blocked?)
2) If yes, look for any obvious damage to wiring
3) if no, unhook positive wire from fan and run a jumper to the battery
4)Still no joy - check ground
5) If running a jumper solves the problem, then get a voltmeter and start tracing the wiring to see where it "goes bad".
------------------
Charlie McCall
1985 DeTomaso Pantera GT5-S #9375
"Raising Pantera Awareness across Europe"
http://briefcase.yahoo.com/gt5s_1985
After doing Charlie's trouble-locating checks, remove the relay that is supposed to power the fan giving trouble. Unbend the tabs holding the cover to the relay and pull it off. Inside is a set of points and most likely, rust and maybe water. Clean everything up, and remount the relay with the cover UP so rainwater doesn't accumulate in there anymore Rotate the other relay to match
The DC fan motors may have worn brushes after 32 years of use. Jaguar windshield-wiper motor brushes fit if you clip one lead off. If the motor is siezed, the bushings may also be full of crud; disassembly and WD-40 can flush out some of the slop and allow the armature to turn smoothly again. Stock sensors routinely fail, but new sensors, relays and motors are all available from the various Pantera vendors including the host of this Site.
The DC fan motors may have worn brushes after 32 years of use. Jaguar windshield-wiper motor brushes fit if you clip one lead off. If the motor is siezed, the bushings may also be full of crud; disassembly and WD-40 can flush out some of the slop and allow the armature to turn smoothly again. Stock sensors routinely fail, but new sensors, relays and motors are all available from the various Pantera vendors including the host of this Site.
When one of my fans failed to come on, it was because it's relay(Coil)had burned-out. I have long since gone to Halls' Miriya Motors and fans, and have eliminated the relays alltogether. Best of luck with it. Marlin.
quote:
Originally posted by gman:
my second radiator fan dose not come on.the fan works.do i change the relay or the sensor in the radiator?this is all original equipment.thanks!
I did jump the fan and it does work.I did open up relay and press down on points and the fan came on.Looking down at lower radiator area where the sensor is located,may have small leak .What is the best way to check or remove sensor or should I just remove radiator and it repaired and replace sensors?thanks
OK, now, bypass the thermostat in the radiator- wire the motor through the relay directly, by simply grounding the sensor wire. If its the sensor thats bad, the fan will immediately come on. I assume this is a stock radiator; if so, the sensors are held in with a triagular ring and three tiny screws on welded studs, that are usually badly rusted from seepage. I'd drain the radiator, then use some sort of rust remover on the studs and nuts before attempting to untighten them. Most such break, and then the only fix is to have a radiator shop reweld a stud in place of the broken one(s), or solder a plug in to blank off the hole. Stock sensors are available,along with the little paper gasket to seal them. Be sure you know which sensor failed, the high or the low-temp one. You also badly need a wiring diagram for your Pantera. These are routinely available as a large laminated sheet from all the vendors.