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Audible alarm for engine temp. not working on 580SL

6

69zfarmer

Well-Known Member
Joined
Jan 31, 2006
Messages
152
Location
North Alabama
I dodged a bullet monday. The serpentine belt that drives the water pump and alt. broke. 580SL was in the red on temp guage for no telling how long. Any way i put a new belt on and it is ok. The #26 "Engine Temp Switch" It is supposed to trigger the #25 "Warning Alarm" and it did not. Alarm is working on other things. Looking at the wiring diagram. I guess the #26 ETS gets its ground from the engine and when it senses high temp it grounds and sends ground signal to #25 warning alarm right?
Well when i take wire off of ETS and ground it alarm does not sound. Where do i start looking?
 

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