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no power to radiator fan and ac circuits

 
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Old 14 Apr 2014, 11:04 am
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Default no power to radiator fan and ac circuits

just picked up a 2002 pt touring , auto, and replaced fuel pump... also needed fuel pump relay replaced behind airbox... let it run for a while and found no fan when gets to temp.. no ac either.. tried to jump compressor at low pressure switch and have no power there..after reading for a few hours using the search it seams that from what ive read the fan and ac have some integrated circuits that may be where my issue lies..... could someone clarify where I might find the junction of these circuits ?? thanks for any help you can provide.. steve.
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Old 14 Apr 2014, 12:40 pm
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Default Re: no power to radiator fan and ac circuits

have you tried applying 12 volts directly to the fan? neg in the middle, pos on right for low and left for high?
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Old 14 Apr 2014, 01:20 pm
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Default Re: no power to radiator fan and ac circuits

Steve,

The fan and Compressor have an integrated circuit as far as the fan should come on immediately when the compressor is engaged to keep the compressor cool but the fan won't stop the A/C from working. So you have to verify the A/C circuit is all correct meaning, fuses are intact, low and high coolant pressure is correct, low and high pressure switches are good. The other part of the equation is the fan circuit and as soyomb pointed out, you have to verify both high and low fan speeds are working.
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Old 16 Apr 2014, 05:40 pm
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Default Re: no power to radiator fan and ac circuits

let me be a little more direct to lessen the confusion....

the fan..... the relays and fuses are good for that circuit.... there is no power to the plug the fan plugs into.... so right now it does not matter weather or not the fan itself works.....

the ac..... the fuses and relays to that circuit are good... there is no power to the compressor, the low side switch or the high side switch....so weather or not those switches are good doesn't matter at this point....

until I get power to those spots the sensors are useless,,,,, good or not....

now, can anyone help me find out if theres a plug between those spots or a common ground that may be part of the issue..

one other bit of info.... before this started , the timing belt broke and was replaced.... after that this started......
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Old 16 Apr 2014, 08:07 pm
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Default Re: no power to radiator fan and ac circuits

No offense, but you checked both fuse panels - the one inside by driver's knee, and the other by the air cleaner under the hood?
Only other thought is to scour the side by the timing belt and look for a separated connector.
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Old 16 Apr 2014, 08:23 pm
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Default Re: no power to radiator fan and ac circuits

yes, I checked both boxes and im good there,,,, I have power to the relays and the relays are good...
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