Quote:
Originally Posted by Arthur Dalton
Well, the fans are wired together, so you have a basic problem with one of them.
They are supposed to run at low speed with the a/c and high speed at 105C coolant temp.
There are 2 easy test for circuit verification..
Key ON..
Jumper pigtail wires at the pressure switch at the a/c drier..that should give you LOW fans..
Pull connector off blu 2 wire sensor at thermo housing..that should give you HIGH fans
Report findings
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I REALLY need to check this on a 2.6 190E I'm refurishing! Can you post pics of the pressure switch on the AC drier and the sensor on the thermostat? If not, I can take pics of the general areas on my engine and you could point out the correct test points.
THANKS!