Jellybean Posted April 22, 2018 Share Posted April 22, 2018 Got a few heater control units and one that is working; it all lights up but no functions work ; is there an ECU in the car that controls functions , fan speed, temperature , A/C... Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted April 23, 2018 Share Posted April 23, 2018 Got a few heater control units and one that is working; it all lights up but no functions work ; is there an ECU in the car that controls functions , fan speed, temperature , A/C... the lights above buttons light up when you press it or just light up with the lights? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted April 23, 2018 Author Share Posted April 23, 2018 just light up with the lights , the lights above buttons dont light up when you press it I am thinking it is the A/C Amplifier Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted April 24, 2018 Share Posted April 24, 2018 just light up with the lights , the lights above buttons dont light up when you press it I am thinking it is the A/C Amplifier Might be a stupid question but you did check the fuse in the drivers footwell yeah? Quote Link to comment Share on other sites More sharing options...
Jellybean Posted April 24, 2018 Author Share Posted April 24, 2018 All fuses in engine bay and footwell ,cigarette lighter, relays etc Tested 12v with the mutimeter going to the Heater control Block connectors , will play around with the wires, and check the A/C amplifier with a multimeter Quote Link to comment Share on other sites More sharing options...
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