C32 AMG, C55 AMG (W203) 2001 - 2007

Unusual IC Pump problem?

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Old Jun 20, 2014 | 04:11 PM
  #1  
jayitx's Avatar
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2004 Capri Blue C32
Unusual IC Pump problem?

Hey guys,
I've searched this forum and the internet on this one. I have a 2004 C32 and the IC pump is not turning on. I just replaced a leaky intercooler, which is awesome, but I can't get the IC pump to work.. It turns on and runs if I hit it with 12v directly from the battery, but that's it. I checked all fuses (mine is a 2004 so I have fuse 18 in the back, no #5 or relay C), and every fuse in the car is OK. I tried checking the red power wire in the pump cable but can't find where it goes. I think it runs along the fire wall behind the air box inlets, but there is no solid red cable in the front fuse box under the hood, or in the fuse box inside the front door. I can find a solid red wire to fuse 18 in the trunk, but I get no continuity with the pump wires. The brown ground wire from the pump goes right to ground in the engine bay, and it ohms-out there. But it also ohms out with the red (positive) battery test point. Does anyone know where the red wire from the IC pump plug goes, so I can check it for continuity? I suspect I may have a short somewhere but would like to confirm it. Also, if I were to rewire the IC pump to turn on with the ignition '2' position, where can I find a wire for ignition '2' power? Again, it's a 2004 C32. Thanks!!
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Old Jun 21, 2014 | 12:02 AM
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From: Grapevine, Texas
2004 Capri Blue C32
.....

Nobody has schematics or wiring diagrams for the IC pump circuit??
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Old Jun 21, 2014 | 12:14 AM
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You may having a bad IC pump fuse or relay, did you check any on them...??

ZAYED,,
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Old Jun 21, 2014 | 12:46 AM
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From: Grapevine, Texas
2004 Capri Blue C32
I checked them all. The pump runs fine if 12v is applied from the battery. The fuse is #18 on my 2004, and it's not blown. There is no relay for the 2004.
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Old Jun 21, 2014 | 12:57 AM
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Ah, sorry, i thought it has relay..!, is that mean your IC pump controlled via the ECU itself..?

ZAYED,,
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Old Jun 23, 2014 | 12:46 PM
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The fuse is #18 on my 2004, and it's not blown.
did you test it or just look at it?
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