Euler

Any of you guys have a wiring diagram for the radiator cooling fan circuit and a fuse box layout legend. Info on line is nearly impossible to find. At this point the fan will not run and I have zero tech info to work with.

Pur Childs

Hi have you found the location of the cooling fan fuse I have a 2009 ml550 and my fan don't come on is you know OT will be loved to share that info with me thanks

Maj. Dundee

Open the hood and at the Pre-Fuse Box tell us how many RED wires are coming out of the bottom. Photo will help.

Pur Childs

cooling fan hi its the same as the picture and thanks for your help

Maj. Dundee

You did not answer my question.

Pur Childs

It looks like 3. Or 4

Sorry about that i took this pic so you can see

Maj. Dundee

Pur, I am trying to help help but your answer of 3 or 4 does not help me.

Aside from from that huge RED cable, how many other RED wires are there?

Do you own a DVOM (Digital Volt Ohm Meter) or a test light, preferred?

Pur Childs

I have a fuse tester a 12volt one and I just checked the harness plug to the fan and it has power but the fan still don't come on and the thermostat is new
its 3 red wires one looks red but it kinda don't ..that how come I said 3 our four I took a picture so you can see ..and my friend thank a lot for your help also im still try to learn the page

Maj. Dundee

Turn the key to the on position and at the fan connector, test the RED & PINK wires for 12v and then check the BROWN wire for ground.

Pur Childs

• [QUOTE=Maj. Dundee;8264543]Turn the key to the on position and at the fan connector, test the RED & PINK wires for 12v and then check the BROWN wire for ground.

Ok sorry about the late reply im just working so much ill try but I believe I've done it with the test light and the ground brown when I hook it to a power source the tester does light up and the red also when I grounded it has also lit up ..i just don't remember if I had the key turned

Maj. Dundee

Pur, I do not what you are saying.