Fuel Pump Electric Terminals

[randywebb]

Is there any way to tell which terminal s supposed to be ground and which gets + 12V?

thx
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1986 2.1L Westy 2wd Auto Trans.

[insyncro]

Most fuel pumps have it marked on them.

[Christopher Schimke]

Sometimes only one pole is marked, so if you don't see a + or - designation on one pole, look at the other.
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[insyncro]

I have seen different sized posts as well....IIRC, larger +, smaller -.

[Ahwahnee]

[randywebb]

Here is my problem - I think the old pump is bad and removed it for bench testing.

But I want to hook it up correctly for testing. I don't see any polarity markings anywhere. There is an "R" which you can see in the photo, BUT BOTH terminals have that "R" on them.

Any ideas?

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1986 2.1L Westy 2wd Auto Trans.

[T3 Pilot]

Clean the build up from the end of the pump and Look for the polarity marking molded into the plastic.
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1988 Vanagon

The most important part in every vehicle is the nut behind the wheel......

[insyncro]

[insyncro]

Bosch pump:

[randywebb]

thx - will have a go at that
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1986 2.1L Westy 2wd Auto Trans.