W211 AMG Discuss the W211 AMG's such as the E55 and the E63

DIY or anybody know how to hardwire the IC pump to run constantly?

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Old Sep 17, 2013 | 12:47 PM
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'05 E55, '12 C63
DIY or anybody know how to hardwire the IC pump to run constantly?

I've been reading some threads and it doesn't seem like there is a tune out there for this, if there is, I haven't found it. Is there a way to hardwire the IC pump to run constantly and never off/on? If so, is there a DIY on how to do this and what risk there are? I can understand shorter pump lifespan, but that's worth the $100 for a consistent running car in the summer heat. Any instructions on how to do this? How difficult is the job? thanks in advance
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Old Sep 17, 2013 | 01:06 PM
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2003 W211 E55, 2003 W220 S600
thick orange wire in the driver side ecu box for switched 12v
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Old Sep 17, 2013 | 01:12 PM
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'05 E55, '12 C63
Sorry, but, what does that mean? Disconnect it? Or switch it to 12v?

Have you done this? Any benefits you've seen?
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Old Sep 17, 2013 | 01:19 PM
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Originally Posted by Baronet1
Sorry, but, what does that mean? Disconnect it? Or switch it to 12v?

Have you done this? Any benefits you've seen?
That wire gives you power when you switch ignition on. So you can splice it and run wire to your intercooler pump so it kicks on when you turn the key
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Old Sep 17, 2013 | 01:19 PM
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05 E55 AMG, E320 CDI, Turbo E46 M3,IS300 2JZGTE,VQ35 Turbo Maxima, Mercedes 300D
Run constantly? I assume you mean when the ignition is on right?

Mine is wired this way ... I can't remember how I did it though haha .. I'll take a pic later. One thing though is that it comes on when the ignition is on ... even if the engine is not running. I'd like to change that part ... I only want it on when engine is actually running ... not when key is on but engine not running. There's probably a way .. I was just lazy and hooked it up to something that was live when the engine was on and dead when I took the key out.

Originally Posted by Baronet1
Is there a way to hardwire the IC pump to run constantly and never off/on?
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Old Sep 17, 2013 | 01:20 PM
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Originally Posted by Baronet1
Sorry, but, what does that mean? Disconnect it? Or switch it to 12v?

Have you done this? Any benefits you've seen?

Take the power wire from the pump (going to assume red) and connect it to the orange wire hes talking about. Take the other wire and ground it to the chassis.

Cheers!
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Old Sep 17, 2013 | 01:57 PM
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Originally Posted by S2K750
Take the power wire from the pump (going to assume red) and connect it to the orange wire hes talking about. Take the other wire and ground it to the chassis.

Cheers!
yes you can use the connect the ground wire to ground on the ic pump connector.
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Old Sep 17, 2013 | 04:21 PM
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Search and you'll find other threads. Pump can be turned on constantly using an EC ECU flash, no rewiring needed.
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Old Sep 17, 2013 | 04:26 PM
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Originally Posted by JoeNobody
Search and you'll find other threads. Pump can be turned on constantly using an EC ECU flash, no rewiring needed.
+1
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Old Sep 17, 2013 | 04:35 PM
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The firmware is pretty smart as the pump tends to run when necessary. If you briefly tap the throttle to wide open while in neutral, the pump should turn on. You can touch the HE with your hand and it will become warm to the touch from the circulating coolant. If you monitor your IAT you can see when the pump is on.
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