Fuse question ?
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Joined: Oct 2002
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Fuse question ?
I checked the fuse box with the car closed and a few fuses are still with power and they are 4 in total
1.D= auxiliary fan
2.C= rear roof light trunk light rear door locking sys central locking sys door lights, aut. antenna, control unit seat adjustment memory
3. fuse #9 diagnostic term 6, hazard warning system, clock, front roof light, radio, vanity mirror light, relay comfort circuitry term 86
4. fues #10 heatable rear window
All this fuses seem to be supplied with power when the car is closed
Are they suppose to have power even if the car is in the off position closed with the ignition key in my pocket
SHOULD THEY STILL BE REQUESTING POWER FROM THE BATTERY IS THIS NORMAL
1.D= auxiliary fan
2.C= rear roof light trunk light rear door locking sys central locking sys door lights, aut. antenna, control unit seat adjustment memory
3. fuse #9 diagnostic term 6, hazard warning system, clock, front roof light, radio, vanity mirror light, relay comfort circuitry term 86
4. fues #10 heatable rear window
All this fuses seem to be supplied with power when the car is closed
Are they suppose to have power even if the car is in the off position closed with the ignition key in my pocket
SHOULD THEY STILL BE REQUESTING POWER FROM THE BATTERY IS THIS NORMAL
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Joined: Sep 2002
Posts: 58
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From: San Diego, CA
1992 Mecedes-Benz 400E
It is normal for those fuses to still have power even when the car is off. Although #10 is iffy. The reason for each is this:
1) Fuse D has power because in situations where there is a lot of heat the fan comes on to get the hot air out of the engine compartment. It should stay on for a max of 20 minutes depending out outside air temp.
2) Fuse C has power because you need the doors to lock and unlock at all times, as well as the seats and the trunk light is triggered on by opening the trunk.
3) Fuse 9 has power because the warning lights always need to be used, the clock always needs to keep time and so forth.
4) Fuse 10 has power because the heatable rear window is designed to stay on when the car is turned because the car might be turned on again, like in the morning when stopping to get coffee. It then after some amount of time turns off. The electronic defrost though does consume a lot of power.
If any of those fuses are not normal it is the #10 fuse.
1) Fuse D has power because in situations where there is a lot of heat the fan comes on to get the hot air out of the engine compartment. It should stay on for a max of 20 minutes depending out outside air temp.
2) Fuse C has power because you need the doors to lock and unlock at all times, as well as the seats and the trunk light is triggered on by opening the trunk.
3) Fuse 9 has power because the warning lights always need to be used, the clock always needs to keep time and so forth.
4) Fuse 10 has power because the heatable rear window is designed to stay on when the car is turned because the car might be turned on again, like in the morning when stopping to get coffee. It then after some amount of time turns off. The electronic defrost though does consume a lot of power.
If any of those fuses are not normal it is the #10 fuse.
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Joined: Aug 2002
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From: Germany
'00 S320 W220, '98 A160 W168/ sold in 2005 '86 260 E W124 '90 260E W124
My guess concerning the fuse 10 is, that the rear window heater is operated through a relay, and the relay circuit is of when the ignistionis off, so even the heater fuse stays on power it wont switch on.
