Rear Defogger Circuit Question
#1
Rear Defogger Circuit Question
I am starting to wire up my MegaSquirt and I'm a bit confused by the defogger circuit. Looking it over, I cannot see why it feeds into the OEM ECU at all. The circuit turns on and off the indicator lamp and defogger just fine with out this connection. Does the ECU change something if the rear defogger is on? Is there any reason to have pin 2L connect to my MS3? Right now I am planning on leaving it floating. Gracias.
#2
Boost Czar
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it appears it's just so the ECU knows, possibly bumps the idle valve up a bit.
if the connection to 2L was removed, the light would still illuminate and the relay would still activate from the ground path back to G400.
if the connection to 2L was removed, the light would still illuminate and the relay would still activate from the ground path back to G400.
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