MY heater is stuck on low fan... is this a wireing problem or do i need to replace the whole thing.

 

May be the blower speed switch or the fan motor, or a bad ground connection to the motor. Try powering the fan motor directly from the battery + terminal, to verify motor operation & ground continuity.

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Tim

1992 Z28, 305 TPI 5 speed, 12.0 sec @ 114.8 mph

1984 Berlinetta 305 TPI Auto, 13.8 sec @ 99.7 mph

 

Most likely the HVAC switch panel contacts have gone bad on you.

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87 TA, 305 TPI, Custom CAI, K&N, ACCEL 8mm wires,ACCEL Super-coil, ACCEL Plugs, JET TPI Airfoil, Cherry Bomb Muffler, 160* thermostat
The Phoenix Project..click to see my project car
Trans Am stuff and GIRLS, GIRLS, GIRLS!!!!!

 

Tim thanks, you were right. The ground was bad, i was thinking it was the unit the whole time and thats all i was playing with <because the unit was removed and inactive for 3 years prior to me buying it> I appreciate it.