by CAJUN 93 » Tue May 15, 2007 6:16 am
i know this kinda oversimplifies things, but its a really simple system. either your low or empty on freon (i know it sounds kinda wierd to happen overnight, but it has happened), or you have an electrical component inop.
1st, hook some guages to it and see if it's still under pressure.
no-- shoot some freon in it and dye and look for the leak.
yes--get out the test light and start checking for voltage at the connectors until you find your problem.
try jumping across the low pressure switch (cycling switch) connector and see if the clutch engages.
yes- the switch is bad, replace
no--unplug connector on compressor and check for voltage on the body side.
voltage no-- work backwards along wiring up to and including the control head inside to find the break in the supply voltage.
voltage yes- supply 12 volts via a jumper wire from the battery straight to the compressor. clutch should click and engage. if it doesn't, replace clutch.
it doesnt usually take too much searching to find the bad component. hope this helps.
daryl
93 d350 5spd 3.54-bhaf,stg iv,banks intercooler,bosch185,16cm,pacbrake,4" straight exh,pump mods,366 spring,leece-neville alt.
hers- 93 d250 auto 3.54- pump mods only
ours- 93 w350 dually, auto, 3.54. stock for now
parts 93 d350 auto, 92 d250 auto.