SL55 AMG, SL63 AMG, SL65 AMG (R230) 2002 - 2011 (2003 US for SL55 and 2004 for the SL65)

SL55/63/65/R230 AMG: no power to h/e pump

Old Aug 13, 2009 | 12:22 AM
  #1  
SS2Z06's Avatar
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2006 SL55
no power to h/e pump

I recently replaced the h/e pump with a johnson and all was ok. I now installed the code 3 heat exchanger and went to blead the system and now coolant was being circulated by the pump. the pump isn't coming on. the connections seem good but when testing for power(even before my connection there is none). I am at a loss and about to lose it after all the bs that went into this. Any help would be greatly appreciated. Ive checked what I believe to be the fuse for the pump was. The bumper is still off if that makes a difference.
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Old Aug 15, 2009 | 09:51 PM
  #2  
2003 S600's Avatar
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Joined: Jan 2007
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From: ca
2003 s600
check the fuse, on mine it is in a little box on passenger side not in ecu box, closer to front by the right abc strut top 10A fuse. Or relay bad.
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Old Nov 10, 2009 | 04:22 PM
  #3  
aluthman's Avatar
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Joined: Aug 2009
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From: Oakdale, CT
2003 SL55 AMG
I am having the same problem with my SL55. Where is the relay for the pump and does anyone know the part number for it in case I need a new one?
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Old Nov 10, 2009 | 05:33 PM
  #4  
Exotic-metal55's Avatar
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From: Texas
2003 CL55
Originally Posted by SS2Z06
I recently replaced the h/e pump with a johnson and all was ok. I now installed the code 3 heat exchanger and went to blead the system and now coolant was being circulated by the pump. the pump isn't coming on. the connections seem good but when testing for power(even before my connection there is none). I am at a loss and about to lose it after all the bs that went into this. Any help would be greatly appreciated. Ive checked what I believe to be the fuse for the pump was. The bumper is still off if that makes a difference.
If you have power to the pump,, then pump is bad.. I put two Johnson`s on my car and they both burned up in a few hundred miles.. Never went back and never will.. One of mine when out on a dyno test and coolant became so hot that it blew a heater hoses off! That was a mess!
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