I'm a "Jeep" guy not a "Volvo" guy so I have no more emotional attachment or emotional energy for this car. 1993 Volvo 850 GLT, 133,490 miles, 5 cylinder, 20V, AT, leather, sun/moon roof, allow wheels, maroon. Located north of Indianapolis, Indiana. I'd say it's worth every bit o...

A version 4 part finally popped up on ebay... much too late for winter, but here's hoping!

wow. good to know.

Yes, Ignition is on. Yes, the fan control module (heater fan power module) #9144354 is what I purchased, because my initial research showed that if the fan went bad it often took the fan controller with it, usually the MOSFET inside. I checked it and it was OK, but tried the replacement part anyway....

Yes, probably. I haven't traced the circuit components back to the wiring harness yet. The voltage regulator is inside the dash module. On that circuit board, I found a 7805 regulator, found by observation not the schematic, the details of what's inside aren't on the schematic. On the schematic, thi...

Yes, I have ECC. Variable fan speed, an Auto setting and temperature for each side with numbers. Electronic fan controller with a MOSFET, not a resistor pack. The replacement controller is the same part number as the one I took out: 9144354. The ad said the replacement was for 93-95 Volvo 850. This ...

I get codes for every port except B1. Early on I got the flashing on the dash board LEDs when the motor first locked up, but those stopped. Before the fan went out I didn't try to get any codes from under the hood. It took me a month or so from the time the fan went bad until I was able to get to th...

The Self Diagnostics is NOT working. When I connect to port B1 I get a solid LED and nothing else. All the other ports work and flash diagnostic codes.

jreed, yes, no readout before or after the swap - same steady on LED. No apparent connector/wiring damage. No voltage on the fan pins.

Rick, thanks for the wiring diagram. That will help further troubleshooting.

1993 Volvo 850 with ECC. 20-valve non-turbo, AT. Problems started with a squeaky blower fan motor. Ignored it. Then fan not working. Then flashing lights on the AC-off/Recircutale buttons indicating stalled fan motor. No problem, set the system to off and go find parts. Problem: after getting new pa...