Quote:
Originally Posted by samdon
Most notable is the grounding method. The 115 cars do not have the braided strap grounding the series.
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They must have had a ground return. Use a DMM to measure the resistance to GND (Chassis) on the black wire that was connected to the front glow plug. This would never see 12V (as you were told) in the series style system unless you had an open plug (there is a voltage drop across each plug and resistive wire). I can't understand why the final plug in series would be connected to a temp sensor...
You should have 12V on pins 3 (when cranking) and 4 (ignition on) at the relay. Pin 1 should be GND (check resistance to GND w/DMM). Pin 2 should be the 'temp sensor'. Pin 5 = B+, pin 6 = GP output, and pin 7 = Lamp control.