1986 1/2 A/C Relay
#17
Instructor
Thread Starter
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Thanks Kevin!
Boaf, the relay we're referring to is at the upper left.
Kevin -- one minor detail, the '83 (and in fact 80-83 as far as I can tell) does not have the infamous relay. That started in 1984 cars. With 80-83, a relay is mounted in that location on the board, but it's a different type of relay and for a completely different purpose. The AC +12V power goes right through the copper trace on the HVAC "slider" directly with no relay involved there at all. Which is even worse, because if there's a high current condition, the copper traces could be destroyed! I installed a relay at the CE panel to take the load in my '83 (triggered by the HVAC) for that reason. For anyone who wants to go down THAT rabbit hole: https://rennlist.com/forums/928-foru...o-78-84-a.html
Boaf, the relay we're referring to is at the upper left.
Kevin -- one minor detail, the '83 (and in fact 80-83 as far as I can tell) does not have the infamous relay. That started in 1984 cars. With 80-83, a relay is mounted in that location on the board, but it's a different type of relay and for a completely different purpose. The AC +12V power goes right through the copper trace on the HVAC "slider" directly with no relay involved there at all. Which is even worse, because if there's a high current condition, the copper traces could be destroyed! I installed a relay at the CE panel to take the load in my '83 (triggered by the HVAC) for that reason. For anyone who wants to go down THAT rabbit hole: https://rennlist.com/forums/928-foru...o-78-84-a.html
Boaf
#18
Burning Brakes
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Hi Boaf,
Please follow the debugging steps outlined above (and read through all those links I posted) before diving in to the hvac unit. However, yes, just the relay can be replaced, it is not necessary to replace the entire hvac unit.
Please follow the debugging steps outlined above (and read through all those links I posted) before diving in to the hvac unit. However, yes, just the relay can be replaced, it is not necessary to replace the entire hvac unit.
#19
Instructor
Thread Starter
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Boaf