Question about 1993 Mitsubishi Diamante

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The cooling fan on my 1993 Mitsubishi Diamante is not working but I do know the fan motors are OK, How do I check the sending units and relays?

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The sending unit will give an output reading of 12 volts to the relay. If the voltage is currently going to the relay replace the relay

Posted on Jul 04, 2010

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1 Answer

Where can I find the Fuel Level Sending Unit in my 2003 Diamante ? My fuel guage is reading empty and I know the dash guage works and the fuses are OK.


Sending unit is inside the tank. First, check that if you ground the signal wire near the tank then the gauge rises. If so, you must pull the unit from the tank.

Oct 15, 2016 | 2003 Mitsubishi Diamante VR-X

1 Answer

Temp gauge peaks on 1993 dodge spirt


I have similar problem in that my rad cooling fan won't run when hooked up to temp sending unit. Sending unit works okay, displaying what seems like proper temps on inside gauge, rising & falling with engine temp. However, my fan does NOT turn on when wire unplugged from sending unit. Tested fan motor with 12v applied directly & it runs fine, so motor okay.

Haynes manual identified a faulty cooling fan relay (in a situation with your symptoms), which is mounted on the drivers side fender of the engine compartment with 1 other on a support bracket (2 others on same bracket if you have ABS), facing forward toward headlight (NOT nearby ones that are parallel to fender, which has 3 relays on a support bracket). This should work in your case, but didn't in mine.

Several of these close-together relays have the same # on them, so you could swap 2, to see if this is your problem, since normally 2 or 3 relays wouldn't fail at same time. To be sure, I bought a new generic relay of proper # from local auto parts store -- about $10-12 I think -- and installed it in the right place but fan still didn't work. Swapped the 2 relays next to each other (there are only 2 on my forward-facing bracket), both with same #, and still no go.

I'm TOTALLY STUMPED on mine, but yours should work with a functioning relay of proper #. Let me know how it goes.

If anyone has suggestions for my related problem, I'm all ears!

Jun 20, 2014 | 1993 Dodge Spirit

1 Answer

Cooling fan does not run?


At the main fuse and relay box, check the 30A EGI INJ fuse. If OK, the main relay closes to apply power to the cooling fan relay. Next, check the 30A FAN 1 and FAN 2 fuses.If OK, power is being applied to the fan control module. The PCM processes engine coolant temperature sensor input and sends a signal to the fan control module which, in turn, causes the cooling fan motor to operate. Fan failure could be caused by malfunction of the cooling fan relay, the fan control module, the engine coolant temperature sensor, the cooling fan motor itself, or the PCM

Oct 06, 2012 | 2005 Mazda MPV

2 Answers

Cooling fan quit running and i cant find relay


Relay may be ok, check the temperature sending unit that signals the relay to run the fan, it may just provide the ground for the cooling fan! Temperature sensor for the cooling fan circuit!

Sep 06, 2010 | 2006 Chrysler PT Cruiser

1 Answer

Cooling fan motor will not run i just replced


driver side strut tower
firs and last relay any way u want to look at it dont mind the other relays just the two outer relays
make sure the ecu signal is working
warm up the car and disconnect fan motor make sure tha you have ggod ground get a test light and check for the litr green wire to see if its going to send signal to the wire

Jun 12, 2010 | 1993 Dodge Caravan

1 Answer

Cooling fan on radiator do not work sending unit on block checks ok with oms meter relay in fuse box ok now what


Change the thermostat and bleed the ir from the cooling system,then ,if the cooling fans do not come on,check the relay module under the cooling fans on drivers side,they are bad to go out,but if there is air in the cooling system,the cooling fans will not come on.

May 31, 2010 | 1998 Dodge Caravan

1 Answer

The cooling fan work never stop ok after the car start in nourmel temptur the cooling fan work on never stop


thermostat /sensor for fan switch faulty,get it checked,bad earth,may need auto elec to look

Nov 05, 2009 | 1997 Mitsubishi Diamante

1 Answer

I have a 1993 pontiac sunbird, the radiator cooling fan doesn't go on to cool the motor. I checked the fan and it works. Is there some type of sending unit temprature switch to the fan?


There is a temp sending unit on the engine, it sends a signal to the engnie computer which provides a ground to turn on the fan relay. You might want to check the relay for the fan, I believe its on the passenger side just aft of the strut tower but dont quote me on that.

Jun 25, 2009 | 1994 Pontiac Sunbird

1 Answer

2001 Mitsubishi Diamante OBD2 cod p1751... where is the A/T relay


Has this symptom occured several times or just a one off? If the trans works OK I wouldn't mess with it.You know what they say about sleeping dogs! I think Mitsis are not that strong in the auto trans department

May 16, 2009 | 2001 Mitsubishi Diamante

2 Answers

Is there a cooling fan fuse?


Everything in car is fused. The fans are controlled by a thermal sensor. You will need a wiring diagram to test for a faulty sensor.

Mar 29, 2009 | 1993 Mitsubishi Diamante

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