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SOURCE: radiator cooling fan 30 amp. fuse keep blowing
The fan may run with jumper wires but if it''s blowing the 30 Amp Maxifuse it's needs a new or used fan motor.It's pulling too many amps.I have almost never seen a fan relay concern.Only other thing you may check is the wiring down near the fan shoud I have seen the 2 wires get loose from the conduit & melt onto exhaust manifold.Hope tHis Helps
SOURCE: how do i install electric fans in a 96 impala ss?
I am not the most mechanical guy and i did it with out much problem. You can get the fans at alot of car parts houses. i just layed under neith the front bumper and there were only a couple of screws and a connector to plug back in.
SOURCE: secondary fan on impala SS 1996 not operating. fan
The PCM controls these fans via certain sensor inputs, ( CTS ) and switches ( A/C compressor for instance ). When relays are removed, both relays sockets should show 12v constant ( battery voltage on "switch side" ). When the key is rolled on, there should be 12v appear in two more places, ("Coil side" ) the relays are then operated by a ground signal from the PCM. ( Powertrain Control Module ) You need a scan-tool to check for fan request, by the PCM. A/C compressor request, etc. If you have any DTC's then repairing them may well fix your problem, otherwise, you may have a faulty PCM.
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