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1991 500SEC Euro, 1987 560SEC Federal
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5,472 Posts
Hi Neil,

I'd wager that bit is ceramic and has some sort of resistor in/on it. Blower fan... ?

My US '87 car has one under the brake booster.
I'll investigate further.

Preresistor.. I think for the Auxilary Fan.

Cheers, MBL
 

·
Moderator
1991 500SEC Euro, 1987 560SEC Federal
Joined
·
5,472 Posts
It is definitely the Preresistor for the Auxillary fan.

MBL
 

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Registered
1984 euro 500sec
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110 Posts
Discussion Starter · #5 ·
I think my aux fan sensor(located in the thermostat housing) is faulty, could this be related?

The fan fails to cut in when the engine gets hot which can cause the engine to boil up. When I earth the single wire that goes onto the sensor the fan works fine and the car stops boiling up. When I replace the sensor tomorow I will also replace the resistor.
 
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