Ml320 W163 2001 fuse F41 recirculation pump, e-box fan...
Does anybody have a clue why my fuse F41 10A recirculation pump, heater/E-box fan keeps on blowing?
And where is the E-box fan situated?
Cheers, Den
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The Coolant Cir. Pump is located in the area below the battery and is controlled by relay #19 and fuse #41
With the, key off and with a new 10 amp fuse in place, remove the elec. connector at the bottom of the pump. Turn the key to the on position and with a DVOM, check the WHITE wire for 12v and the BROWN wire for NEGATIVE.
If both wires check out, reinstall the connector and then check fuse #41 and see if it is blown. If so, the pump is shorted and must be replaced.
Post results for further instructions.
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The Coolant Cir. Pump is located in the area below the battery and is controlled by relay #19 and fuse #41
With the, key off and with a new 10 amp fuse in place, remove the elec. connector at the bottom of the pump. Turn the key to the on position and with a DVOM, check the WHITE wire for 12v and the BROWN wire for NEGATIVE.
If both wires check out, reinstall the connector and then check fuse #41 and see if it is blown. If so, the pump is shorted and must be replaced.
Post results for further instructions.
I checked the wires, they are good (12V and negative). Reinstalled the connector, checked the fuse and it was not blown. Started the car, checked fuse again and it's still not blown. I didn't drive with it yet, but I bet it would blow again...
Cheers, Den
And the fact of only starting up the engin doesn't blow the fuse. What could it be then that it blows when driving? The E-box that starts up at one point and is fawlty? Because the heater works...
The e-box fan and the Cir. Pump are on the same circuit. See my next post for instructions.
Does your A/C controls look like this?
Last edited by Maj. Dundee; Jul 8, 2019 at 07:40 AM.
(The pic that I send before in this thread says that that fuse is for recirculation pump, heater and E-box fan)
OK,I failed to read the diag. correctly. Both the ebox fan and and the Cir. Pump run on the same circuit.
Remove both covers to the fuse box and then the 3 additional screws. Then pull up the fuse/relay module out of the box.
Locate the e-Box fan at the bottom, turn the key to the on position and with your hand feel to see if it is running.
If it's this black part with numbers 29 and 088 written in white on it which is hidden underneath the 2nd cover of the fusebox, then it doesn't seem to work by putting the key to on position, nor when I start the car. The fuse 10A is still ok so far...
While the key is still on, remove the two wire connector and check the WHITE wire for 12v and the BROWN wire for ground.
When the e-box fan is on, does it make a significant sound and/or wind that blows. If it's supposed to, then it doesn't work
https://www.benzworld.org/forums/w16...ml#post7160345
https://www.ebay.com/itm/Igarashi-12...2nr4RW6U7guHBg
But all seems to work better now. Big thumbs up and thank you (again) Maj. Dundee...!


