I have a ground at my thermister but no ground at my relay. Can I jump the ground at my ECM or do I have to buy a new one?
Jul 26, 2018 at 1:21 PM
No ground to my A/C relay
2000 NISSAN FRONTIER
JACOB HAYES
- MEMBER
- 1 POST
- FOLLOW
Advertisement
Good evening.
Did you check for two powers with the key on to the clutch relay?
If you do not, check the fuses listed in the diagram. If you do, then the relay will be grounded by the ECM when it gets the proper signal from the pressure switches. Without that signal, the ECM will not ground the control side of the relay.
Can you manually ground the relay? Yes, you can but there is no protection for the compressor.
Did you verify pressure in the Freon system? You need at least 20 lbs on the low side for the switch to close and send a signal to the ECM.
Roy
Did you check for two powers with the key on to the clutch relay?
If you do not, check the fuses listed in the diagram. If you do, then the relay will be grounded by the ECM when it gets the proper signal from the pressure switches. Without that signal, the ECM will not ground the control side of the relay.
Can you manually ground the relay? Yes, you can but there is no protection for the compressor.
Did you verify pressure in the Freon system? You need at least 20 lbs on the low side for the switch to close and send a signal to the ECM.
Roy
Image (Click to enlarge)
Jul 27, 2018 at 6:53 PM