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Steve Tinker · 12-17-2015, 11:29 PM

Chuck, before connecting anything, I would multimeter across what you describe as the positive connection and the ground connector. Set the multimeter to ohms and read the resistance.
If the reading is zero, the circuit is open / broken.
If you see a resistance value, don't connect to the car yet but connect up to a battery with say a (~15 amp) fused tail and see if the heating element warms up.
At least then you can see if its operational without compromising the cars electrical system.

12-17-2015, 11:29 PM	#3
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	Chuck, before connecting anything, I would multimeter across what you describe as the positive connection and the ground connector. Set the multimeter to ohms and read the resistance. If the reading is zero, the circuit is open / broken. If you see a resistance value, don't connect to the car yet but connect up to a battery with say a (~15 amp) fused tail and see if the heating element warms up. At least then you can see if its operational without compromising the cars electrical system. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4. Last edited by Steve Tinker; 12-18-2015 at 01:17 PM.