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are both fan supposed to turn on at the same time ? any way to test fans on my 96 impala ss only passenger fan goes on
 

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Under normal operating conditions the answers are, "No" and "Yes", in that order.
 

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are both fan supposed to turn on at the same time ? any way to test fans on my 96 impala ss only passenger fan goes on
Gary sells some nice products for our cars but ALSO on his Website is a process for how to test the fans....

Caprice / Impala SS / Roadmaster | Innovative Wiring

And here is that Text if the link doesnt work...

FAN TESTING
If you are having cooling fan problems here are few steps to help you fix them.

1) Check the two 40 amp fan fuses.

2)Pull the two fan relays and look at the fuse box is the plastic around the terminals melted? If so you will probably need a TSB Fan harness if everything looks good reinstall relays.

3)Start the car and pull the connector off the temp sender located in the water pump and both cooling fans should come on. (give it a few seconds). If both fans come on then the system is working correctly.

4)If no fans come on check the ground wires for the fan mounted on the core support on the passenger side.

5)If only one fan comes on swap the fan relays and see if the running fan also swapped if so you have a bad fan relay.

6)If you still have the same fan not working check the fan motor by unpluging the connector on the fan and jump the motor with wires one wire to ground and one wire to 12 volts the fan should spin if not fan motor is bad.
 
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