 Fuel pump polarity (&other questions) |
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| jmitro |
 Dec 22 2017, 07:10 PM
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Senior Member  Group: Members Posts: 713 Joined: 23-July 15 From: Oklahoma Member No.: 18,986 Region Association: None 
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I’ve searched for 3 hours and cannot find the polarity of this Bosch in-line fuel pump. The terminals are not labeled positive or negative, only a smaller M4 terminal and larger M5. Which one is positive and which is negative?
For chassis wiring - the (EDIT) brown is ground and black/red is positive, correct? finally, if I locate the pump to the trunk, how do I back track the wiring from the engine compartment to the trunk? it still needs to go through the relay which is in the engine bay Attached thumbnail(s) 
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Posts in this topic
jmitro Fuel pump polarity (&other questions) Dec 22 2017, 07:10 PM
Jeff Bowlsby I dunno. But if the case is grounded there may be... Dec 22 2017, 07:47 PM 914Sixer I will look at a pump I have tomorrow. I am think... Dec 22 2017, 10:10 PM MarkV Big one is positive....small one is negative.
Dec 22 2017, 10:33 PM jmitro that's what I thought also, but in searching o... Dec 23 2017, 05:29 AM The Cabinetmaker there should be a small +&- on the towers belo... Dec 23 2017, 08:10 AM
jmitro
there should be a small +&- on the towers bel... Dec 23 2017, 10:36 AM Front yard mechanic Simple hook up power and test pump it with water I... Dec 23 2017, 08:36 AM  |
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