From Chevy P30 Motorhome chassis service guide https://www.gmcmi.com/wp-content/upl...sis-Manual.pdf
Under Appendix 2-1 Optional Air Conditioning System...(Figure A2-1-7 Typical ARA Wiring Diagram - Class "A" RV Condenser with Fans) p.2-12
It shows the temp sender switch is normally open, closes to ground at 221F approximately.
NOTE: Starting with the 1991 Class A motorhome, the A/C condenser fan is wired by Chevrolet through the main front end engine wiring harness . The coolant temperature switch is now located in the RH cylinder head with a green wire.
It appears that the electric fan on the front of the A/C condenser should only come on after the relay closes (approx 221F) with the A/C on.
Anyone know how to confirm whether or not the coolant temp sender on the right side manifold is working correctly? Any ideas as to what the resistance value/s should be?