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Old 05-09-2002, 06:45 AM
Registered User
Join Date: Feb 2002
Location: Philippines
Posts: 111
C36 Overheating, both Benzes down...

Yesterday my 190E 2.6 quit while I was cruising. No warning, no noise, engine just died and cannot be re-started anymore. Gonna have it towed to the shop.

Today my 1995 C36's temp reached 115 degrees C! Investigation revealed Auxillary fans were not working and fuse is 31 blown. This supplies power to the Auxillary Fan Relay. I replaced the fuse but it kept on blowing, indicating a fault somewhere.

Does anybody know where the Aux Fan relay is? What are probable causes of the fuse blowing? I cannot use the car if the Aux fans are not working because it is the height of summer here and the ambient temps are REALLY REALLY HIGH. I cannot drive it to the shop because it will overheat in the traffic for sure.

I applied +12 volts directly to the resistor in front of the fans and they both ran smoothly.

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Old 05-09-2002, 07:50 AM
Matt Crooke
Posts: n/a
Bong, have a quick look, is the revcounter working?

When the cooling fan kept blowing fuses in my 190, the rev counter used to stop as well, it turned out that the switch that activates the fan was broken, causing the fuses to keep blowing when it tried to activate.

The same fuse controlled the rev counter as well.
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Old 05-09-2002, 09:10 AM
Registered User
Join Date: Feb 2002
Location: Philippines
Posts: 111
Hi Matt. Yes the Tach is working. I found the relay - it was hidden under a plastic cover at the back of the fuse box.

The Aux fan relay is fine so i am inclined to suspect the other loads on the same circuit (ckt #31): Back-up light and/or heaters.

Anybody got any ideas on how to troubleshoot these loads?

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Old 05-09-2002, 10:53 AM
Registered User
Join Date: Oct 1999
Posts: 1,562

perhaps Rainmaker can help you since I believe you are both located in the PI...

you may try to PM him

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Old 05-09-2002, 11:01 AM
Join Date: Jul 2001
Location: Old Lyme, Connecticut
Posts: 3,596

I would try unplugging the offending parts of the circuit and seeing if the fuse blowing goes away. If not, I would leave the fans on with your set up to check it out (running power directly to the fans from the battery) with an in-line fuse of the rating in your fuse box for this circuit, and take it to the shop to have it fixed.

Sounds like a wire has been scuffed or abraded and now is shorted to the car frame somewhere. With a multimeter and some patience you can probably take care of the issue by identifying the circuits and testing them to see if they are shorted.

Good Luck, Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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