S54 swapped E30 with E36 AC stuff converted to R134a using the infamous guide on here; single pressure switch. System has been functioning perfectly fine (same AC stuff on my M52 swap, just bolted it to the S54) for about 2 years.
Today I was driving from Houston to Fort Worth and noticed it was getting hot. I looked at the HVAC panel and noticed the snowflake and recirc lights had both gone out.
Pulled out, checked fuse 20, it was good. Pulled and checked every fuse - all good.
Got back in the car and pushed the snowflake button to turn AC on. Snowflake button lights up (and so does recirc), but compressor still not coming on. Recirc function works and blower motor works on all speeds.
After getting home I applied 12v directly to the compressor and it engages and works perfectly fine.
I jumped the two wires coming off the pressure switch on the receiver/dryer and nothing happens. If I apply 12v directly to either of the wires coming off the pressure switch, the compressor comes on and works as intended. I removed the switch and put the 2 wires it connects to together....nothing.
-12v to compressor makes it come on
-snowflake button lights up but not sure how to test functionality
-fuse 20 and all the other fuses are good
-pressure switch seems to be in good order, as eliminating it entirely from the circuit does not solve the problem
I'd say it looks like there seems to be no power somewhere between fuse 20 and the pressure switch. I've found 1 or 2 threads with this problem but no solution.
Those who have read my posts know I am HORRIBLE with electrical stuff. If anyone can provide assistance I need it in the simplest of terms. Even "easy" electrical stuff like "check for continuity on pin X" or whatever makes no sense to me so talk slowly
I know there is a troubleshooting guide floating around but I cannot read electrical diagrams at all. I have wasted many dozens of hours and have no better understanding of any of it. Looking for someone with some ideas for common failures, or has seen this situation before...
Today I was driving from Houston to Fort Worth and noticed it was getting hot. I looked at the HVAC panel and noticed the snowflake and recirc lights had both gone out.
Pulled out, checked fuse 20, it was good. Pulled and checked every fuse - all good.
Got back in the car and pushed the snowflake button to turn AC on. Snowflake button lights up (and so does recirc), but compressor still not coming on. Recirc function works and blower motor works on all speeds.
After getting home I applied 12v directly to the compressor and it engages and works perfectly fine.
I jumped the two wires coming off the pressure switch on the receiver/dryer and nothing happens. If I apply 12v directly to either of the wires coming off the pressure switch, the compressor comes on and works as intended. I removed the switch and put the 2 wires it connects to together....nothing.
-12v to compressor makes it come on
-snowflake button lights up but not sure how to test functionality
-fuse 20 and all the other fuses are good
-pressure switch seems to be in good order, as eliminating it entirely from the circuit does not solve the problem
I'd say it looks like there seems to be no power somewhere between fuse 20 and the pressure switch. I've found 1 or 2 threads with this problem but no solution.
Those who have read my posts know I am HORRIBLE with electrical stuff. If anyone can provide assistance I need it in the simplest of terms. Even "easy" electrical stuff like "check for continuity on pin X" or whatever makes no sense to me so talk slowly
I know there is a troubleshooting guide floating around but I cannot read electrical diagrams at all. I have wasted many dozens of hours and have no better understanding of any of it. Looking for someone with some ideas for common failures, or has seen this situation before...
Comment