When the relay clicks do you get 12V at the plug that goes into the fan motor?
My radiator cooling fan is driving me crazy. I have replaced the relay, fuse, fan motor and I still cannot get it to come on with the engine hot or by grounding the thermoswitch (I can hear the relay click, but fan motor will not turn). The fan motor is brand new and works fine connected directly to a 12 volt source. I believe I may have a wiring issue. Any suggestions?
1990 White NA - SOLD
1994 Black NA - SOLD
2006 Red NC - GT with limited slip, HIDs, all OEM.
When the relay clicks do you get 12V at the plug that goes into the fan motor?
While doing the test if you haven't already. Inspect the wires going from the switch to the fan, and also ensure that the connections are clean as well. Any type of corrosion can inturupt signal. I don't know how the connect but if there are prongs for the male end make sure they are all straight as well. I had a car that the ac wasn't working on and found on inspection that one of my male prongs was bent side ways so it looked connected but actually wasn't. If you find this carefully straighten the prong and that should fix it. That is if that is the case. Sorry I can't be of more help, new to the Miata world.
Also.... if the fans were rigged to work in parallel by jumpering wires at the fans it could overload the wiring and damage the relay socket.
RJ
Daily Driver: 2013 Club edition in Pearl White Mica
Lightness? What's that? I drive a PRHT!
I think I joined this club, but did not check the relay yet. Check pin 1R at the computer for continuity (switches to gnd), then see if you're getting voltage at the fan plugs when the car is hot (gnd pin 1r to test, like a deadshort).
Even if the relay clicks, it could still be toast...wiring issue?
If you have a 1.6 car, this is the proper way to do dual fans:
let us know what happens. The multi meter doesn't lie. Either you're getting current, or not...start from the computer and work your way to the fans. You either have a bad computer (doubtful), blown fuse, bad sensor, bad relay, bad wiring, or bad fan motor. Where does the signal die?
We know the fan motor works. Shorting the fan sensor wire doesn't make the fans come on, so we know that another problem is evident. Check the relay terminal and wiring next because I doubt the computer is toast.
all you wanted to know about fan problems on a 1991
TXMC: Drinkin, shootin, racin!
This whole issue started when I had the timing belt replaced. The mechanic unknowingly knocked off the rubber cap from the manual headlight knob and it got wedged into the rad fan. I am beginning to think this is a relay or relay socket issue (especially after reading another forum thread) . I still need to check to see if I am getting 12v at the fan motor connector.
1990 White NA - SOLD
1994 Black NA - SOLD
2006 Red NC - GT with limited slip, HIDs, all OEM.
If the relay clicks and the fan runs when direct wired then I must ask have you checked the fuse? Did you try to direct wire the old motor to see if it ran?
"Pain is inevitable, suffering is optional." Haruki Murakami
Something you may look at is be sure that the fan blade is not hanging on the shroud or in some way binding up,also be sure that the motor does work have purchased new parts in the past that were bad
Just got through exchanging a throt pos sensor that was bad right out of the box.