2006 TB short wheelbase, 270,000km, 4.2L without the auto climate control. Just manual temp control dual zone.
Back in May we found that the ac was not pumping cold. Electro-mechanical fan is engaging, took it for a drive to get airflow over the condenser with no change.
I found the ac compressor was not engaging. The clutch would not activate with key on, engine off or even engine running. I was not sure if the clutch died or seized.
While I have no gauges, there was pressure out the Schrader valve on the low pressure side. I bypassed the low pressure switch with a jumper with no change. The connector does have 5v reference.
The sole 10amp fuse is intact and I swapped relays with known working ones with no change. I then jumped the relay and the clutch engages and the pump runs and runs quiet.
So I am wonder where I can begin looking as to why the compressor is not being commanded on? Thanks!
Back in May we found that the ac was not pumping cold. Electro-mechanical fan is engaging, took it for a drive to get airflow over the condenser with no change.
I found the ac compressor was not engaging. The clutch would not activate with key on, engine off or even engine running. I was not sure if the clutch died or seized.
While I have no gauges, there was pressure out the Schrader valve on the low pressure side. I bypassed the low pressure switch with a jumper with no change. The connector does have 5v reference.
The sole 10amp fuse is intact and I swapped relays with known working ones with no change. I then jumped the relay and the clutch engages and the pump runs and runs quiet.
So I am wonder where I can begin looking as to why the compressor is not being commanded on? Thanks!