Johnson Pump tech question
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Joined: Jan 2005
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From: wisconsin
2003 e55
Johnson Pump tech question
I have an 03 with K2 and Kleeman "uprgrade pump" which is a Johnson pump. I started getting malfunction notice with the Battery. Dealership said at first just auxillary battery was bad and replaced it. 2 days later same malfunction. Now dealer says the new pump is hooked up to some relay that is making the relay fail and keeps draining the aux battery. $600 for the relay and they say if I don't go back to stock hook up it will keep happening. Any ideas where to hook the pump up so it will run continously while the car is on and bypass this problem? Thanks in advance....
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From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
Call Cory at Klee and tell him what is happening. Just the coolest friggin guy. Have paper ready, he can whip stuff by you pretty fast as he deals with it everyday so it's back of his hand.
KLEEMANN Inc. USA
3455 Fillmore Ridge Heights
Colorado Springs
CO 80907
Tel.: +1 719 473 6441
KLEEMANN Inc. USA
3455 Fillmore Ridge Heights
Colorado Springs
CO 80907
Tel.: +1 719 473 6441
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
in my testing, there's no reason to wire the pump to a continuous power source. with exception to when in cold start mode, the ecu already runs the pump all the time.
...so my advice would be to wire it back to stock. you'll make mb happy and still get all the benefits of the johnson pump.
...so my advice would be to wire it back to stock. you'll make mb happy and still get all the benefits of the johnson pump.
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Joined: Jan 2005
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From: wisconsin
2003 e55
thx Chiro. I know very little about this and I am taking it to a non-dealer (former) mb tech who owns his own shop. Should the Johnson be a "plug and play" type hook up to the stock wiring?
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
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From: Mia
2005 E 55
I agree with Chiro if you have the cm30, but if you have the cm90 a dedicated power wire is a wise move imho and use the factory power wire as the trigger on your new relay. I had a three position switch, always on , ecu controlled and off.
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
i actually have mine wired the same way, with a switch in the cabin and i never use it except at the track when the car is off and i just want to pass coolant through the i/c circuit.
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From: Mia
2005 E 55
i could understand that if the amp draw on the cm90 exceeds the stock wiring, but i wouldn't go out of my way simply to wire it to run continuously.
i actually have mine wired the same way, with a switch in the cabin and i never use it except at the track when the car is off and i just want to pass coolant through the i/c circuit.
i actually have mine wired the same way, with a switch in the cabin and i never use it except at the track when the car is off and i just want to pass coolant through the i/c circuit.
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Joined: Jan 2005
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From: wisconsin
2003 e55
Okay, thanks for all the ideas. I got off work and investigated a little myself. First of all, I can't believe I paid for the dealer to change the aux battery. It looks like a 20 min job! I found the Kleeman installer ran the red power wire off the pump and hooked it up before the ?relay and then grabbed the red wire coming off this that was running toward the fuse box/ecu and diverted it directly to the aux battery. It is running continoulsy when i turn the ignition on but without starting the engine.
My thought is to get the new aux battery myself and install it and have a mechanic run the power red to another continous source not involved with the aux battery.....if that doesn't work I just hook the red wire back to the oem setup....we'll see.
My thought is to get the new aux battery myself and install it and have a mechanic run the power red to another continous source not involved with the aux battery.....if that doesn't work I just hook the red wire back to the oem setup....we'll see.
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
just realized that you wired this to your aux battery. that's a no-no and any draw above what the sbc system uses will more times than not, cause a malfunction light. either hardwire it to the main battery or back to oem.
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From: Mia
2005 E 55
There is a 12v supply source in the fuse box that has the ecu, drivers side engine compartment, from the rear battery. You also have a 12v ignition source there but you can use the factory power wire as your trigger.
