At the relay the wire that goes to the compressor is not lighting up. Theres no power there and its not the relay, the relay is good. I checked it. It engaqes fine with a slave line from the positive at battery to switch at compressor and runs great. Its just that, after the compressor switch, the lone black line that goes from that switch to the relay isnt lighting up. The relay isnt lighting up to send power through the line down to the compressor. 25 amp Fuse is goood.
Check if this is a power wire or earthing wire, do a continuity test , one to chassis ,one to power , if get no continuity then the wire has a break in it somewhere
Testimonial: "Thanks! Will comment back."
I guess it is a chevy? I need year and model to look up wiring diagrams? The system has plenty of refrigerant?
Most relays have a load side and a control side, the control side needs voltage and ground. When relay is energized, the load side carries voltage to component. If voltage to load side of relay, if you unplug relay, use jumper wire on the load side terminals, the component should get voltage.
Did you use a test light to check for voltage at applicable fuse/s? Any applicable trouble codes?
Testimonial: "So sorry about that! It's the 2000 sebring convertible, 2.5L. 1g. No trouble codes. Checked fuses w test light . Full of freon. Yea, relay load side is lighting up fine w test light. So, jumper over to compressor or jumper load side to control side in relays ports? Thanks. Checked everything you said so far. Big help, Thx again!"
In the relay diagram, the top wire is voltage, hot all the time and fuse protected, load side.
The second wire down is voltage for control side of relay, fuse protected, different fuse than the top wire. Goes hot with key on.
I believe the next wire down is ground for control side of relay, grounded by the computer. Hope it helps.
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SOURCE: no tail lights or running lights
Next step, replace the Power Distribution Module. It probably has a short in it also. Why in the hell anyone would think it was a good idea to put the fuse box with two circuit boards in it(not properly sealed) is beyond me. I wonder if they would take their lap top into the shower to see if it would still work. Please make a complaint about this poorly designed product at this site. www.nhtsa.gov Chrysler should take responsibility for this problem. I think they keep their company afloat with all the modules they sell.
SOURCE: 2002 Alero defogger
A common thing to fial on these- assumning the grid is ok, and wires are still attched to grid, is the rear def / antenna module. It is behind rt. rear quarter trim panel. The modules burn up, and also melt the connector. the module and connector would need to be replaced.
SOURCE: Buick Regal dying
You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.
SOURCE: No power for AC compressor
try removing the plug off the low pressure switch on the accumalator plug a paper clip into the plug and turn ac on if it comes on then your low pressure switch is bad or your low on refigerant.
SOURCE: can some post the 1999 gmc sierra wiring diagram
you don't have enough pressure in your system. odds are you have a leak someplace and the factory installed a saftey switch to keep the ac from running when there is no pressure. This way you don't end up burning up your compressor.
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