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  #1  
Old 11-30-2009, 08:41 PM
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Join Date: Oct 2003
Location: San Antonio, Tx
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Question 89,190E ovp relay

Hello I having a hard time with a ovp relay at first the car stall lost all power to the fuel pump and no spark. I check anything I could check and it seem there no power to pin 15 of the ovp I try a jumper wire from a key on hot wire to pin 15, it work at first the car start and ran good but later this wire shorted out on me it seem the ovp shorted and pin 15 is hot out not in ok I have a ovp coming but what I need to know is why I not getting power to pin 15 ? I have a poor print out of a Alldata drawing it show as far as I can tell the wire to pin 15 come from the Ign Sw to a Electrical center then to the ovp. What is this Electrical center ? how can I test to see if my bug is there or in the Ign Sw ?

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Old 12-01-2009, 09:54 AM
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The electrical center is the fuse box. Power passes thru the fuse box from the ignition switch to the OVPR.

Goes in 1 connector & out another.
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Old 12-01-2009, 10:42 AM
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Thank you that what I was thinking but wasn't sure. how can I know know if I have a bad Ign sw or a bad wire in the fuse box do you have a good print out you can send me tell me the wire color and pin # at the fuse box ?
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Old 12-01-2009, 10:59 AM
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Quickest way is to just run a wire from ignition switch terminal 15 directly to the OVPR terminal 15.
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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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  #5  
Old 12-01-2009, 11:17 AM
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Join Date: Oct 2003
Location: San Antonio, Tx
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Ok I would like to replace the ign sw I try to do this before but I can't see how you get to the bolt that hold it in it come in from the bottom and there no room to get in to replace just the electrical part

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