How to wire IC pump so it is on constantly
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Former Vendor of MBWorld
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From: Houston
2003 W211 E55, 2003 W220 S600
How to wire IC pump so it is on constantly
I am planning to swap out the IC pump this weekend with the CM30 unit. How to wire the CM30 so it is on constantly when the car is running. Also what size fuse to run with this setup. Would 3amp be ok.
thank you.
thank you.
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From: wisconsin
2003 e55
I have an 03. Initially, it was wired to the acc battery in the engine compartment. Do not do this. It causes the relay for the acc. battery to burn out and is like $400. Some say they wired to an accessory fuse opening in the fuse box but I couldn't find one. I ultimately had it wired to the alternator 5k miles ago and have had no problems. When the engine is on, it runs continuosly.
Thread Starter
Former Vendor of MBWorld
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Joined: May 2008
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From: Houston
2003 W211 E55, 2003 W220 S600
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From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
I did too. Sorry for the false info Shardul.
Could have swore the pump only runs when needed in higher temps or under wide open throttle.
So I guess to bleed her, start her on up and get it warmed up.
Could have swore the pump only runs when needed in higher temps or under wide open throttle.
So I guess to bleed her, start her on up and get it warmed up.
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From: West
2005 E55 Wagon
I ask b/c when the pump is running I can tell by looking into my little fill in tank that I have in front of the engine (water moving around in there from the pump action). When I start the car up in the am, when its cold, I notice that the pump is not on (water not moving around in the tank). After I take it for a drive or when the engine is hot, then the pump comes on (water moving around in the tank). I assumed all of this meant that the ECU is only turning on the pump when its at a certain temp or at WOT. Is that correct?
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
Really?
I ask b/c when the pump is running I can tell by looking into my little fill in tank that I have in front of the engine (water moving around in there from the pump action). When I start the car up in the am, when its cold, I notice that the pump is not on (water not moving around in the tank). After I take it for a drive or when the engine is hot, then the pump comes on (water moving around in the tank). I assumed all of this meant that the ECU is only turning on the pump when its at a certain temp or at WOT. Is that correct?
I ask b/c when the pump is running I can tell by looking into my little fill in tank that I have in front of the engine (water moving around in there from the pump action). When I start the car up in the am, when its cold, I notice that the pump is not on (water not moving around in the tank). After I take it for a drive or when the engine is hot, then the pump comes on (water moving around in the tank). I assumed all of this meant that the ECU is only turning on the pump when its at a certain temp or at WOT. Is that correct?
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From: murfreesboro,tn
2003 porsche 996 turbo
for my slk32 when the rpms reach 2000 the pump kicks on and stays running umtil the car is turned off. most wire the pump to run via a switch so they can circulate the fluid at the track when the car is not running
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2005 E55
I can see the temps drop right after I give it enough gas to engage the S/C
early 03 cars ran all the time and MB stopped that since the pumps were dieing fast.
04-06 cars do not run all the time.
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From: West
2005 E55 Wagon
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From: Texas
e55 w/LET TUNE Drinks: vodka STRAIGHT Wheels: 19" HRE 547r Mods:FF headers ASP Pulley
i have mine hard wired, unless you have a big reservoir in the back no need to keep it running at the track. the HE really needs airflow
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
that may be true for later models as i've only tested my '03. however, the problem wasn't even recognized until '06 and to this day mb refuses to admit there was ever a problem with pumps. with that said, i can't see them making the change as early as '04 or '05 and if there was a change in the way the ecu controls the pump, i'd be willing to bet it came out with a software update much later.
