Questions & Answers for: Cadillac DeVille how to test relays

...relay or blower fan resistor? Thanks. replace the relay , when a relay sticks like that , a good test is to slap it with something like the handle of a screw driver , see if it un-sticks , its not ...

...relays that are together ,it is the bottom relay,,u cant by pass.if relay is good ,if it clicks when turning over and key on and off (it should click and go off if key is turned on) then use a test ...

...relays one at a time (replace the fuse/relay if there is no change in the test light) and observe the test light, and if you do remove a fuse/relay and the test light does dim down to almost nothing, ...

...test light clip to the positive battery terminal and probe each terminal with the tip of the light. One of the terminals should light the light brightly, or the switch is not working. By the way, if ...

...the starter relay or the solenoid. The relay is in one of the boxes under the hood. A quick way to test is to pull the relay out of its socket and use a jumper from the battery positive to the relay ...

relays and still nothing. But every time I jump it it works fine. Any ideas? So the relay coil is not being energized. You will need to determine why. It could be the ground signal from the PCM, which

...relays,and the starter on my 2002 Deville dhs and it still won't start. It won't crank over ? Is there a SECURITY light lit on the instrument cluster . In the under hood fuse / relay box is the start ...

...oxygen sensor (HO2S) bank 1 sensor 1 during normal Closed Loop engine operation. This is an active test. The active test will pass or fail based on the response from the HO2S 1. The active test ...

99 Deville can't hear fuel pump Did you test the fuel pump electrical circuit ! Fuel pump relay ? c GM Fuel Pump Relay Testing

in the gas tank. Find and check the fuse, then see if the relay has power to it -use a voltmeter or test light. If power is there at the relay, hold your finger on the relay while someone turns key to