Fuse #21 blows as soon as the car is started - 1998 S420
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Joined: Nov 2010
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S 420
Fuse #21 blows as soon as the car is started - 1998 S420
Fuse #21 (20 Ampers) located in fuse panel located in the engine compartment near the brake fluid resevoir blows as soon as I start my 1998 S420. Some additional information that may be related as the following:
1. Fuse #21 blows every time I start the car. The things listed against that fuse are automatic climate control, outside mirrors heating, transmission oil cooler and heater wiper. I tried turning off the A/C and then replaced fuse #21 and re-started the car and that fuse still blows as soon as the car is started. I also disconnected the blower motor and blower regulator and started the car and fuse still blows. I try a 25A fuse (instead the 20A) and same problem.
2. The A/C fan is currently only running at one speed which is very low regardless of the settings inside the car. I have not replaced the blower regulator yet which is normally the source of this particular issue because I don't understand the issue with fuse #21 which keeps blowing.
I hope someone can help,
1. Fuse #21 blows every time I start the car. The things listed against that fuse are automatic climate control, outside mirrors heating, transmission oil cooler and heater wiper. I tried turning off the A/C and then replaced fuse #21 and re-started the car and that fuse still blows as soon as the car is started. I also disconnected the blower motor and blower regulator and started the car and fuse still blows. I try a 25A fuse (instead the 20A) and same problem.
2. The A/C fan is currently only running at one speed which is very low regardless of the settings inside the car. I have not replaced the blower regulator yet which is normally the source of this particular issue because I don't understand the issue with fuse #21 which keeps blowing.
I hope someone can help,
Thread Starter
Newbie
Joined: Nov 2010
Posts: 2
Likes: 0
S 420
I just want to share the solution to the problem in case someone else is having this issue. I changed the blower regulator and that fixed the air conditioning and the issue with fuse #21. The old regulator was faulty causing all these problems. Now the AC works great and fuse #21 is OK too.
