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A friend of mine has an 89 that the grid heaters only stay on for 4 seconds when he turns the key on before starting at 20 degress and colder. The grid heaters don't cycle, they just come on and turn off after 4 seconds. He has to cycle the key manually. Once the truck is started, they cycle the way they are supposed to.
Appreaciate any help with this one.
Wiredawg
__________________ *U.S. Air Force Retired, 30 Years*
09 4500 SLT White QC 4X4;11'4" tow body; Auto/4.44s; SMARTY'd
Gird Heater Cycle Problem on '89
Linear Mode
