Fuel sending unit wiring

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Sep 12, 2020 | 06:30 PM

OldCoastie

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From: Santa Fe

Fuel sending unit wiring

I have a 94 convertible XJS. Fuels sending unit was bad and I cannot remember which of the two wires went where when I pulled it.

Sep 12, 2020 | 10:51 PM

Jagboi64

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From: Calgary, Canada

Shouldn't matter, the sender is not polarity sensitive.

Sep 12, 2020 | 11:54 PM

Greg in France

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From: France

On a pre facelift HE (different sender) it is polarity sensitive. No idea if the facelifts are.

Sep 13, 2020 | 12:57 AM

Jagboi64

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Quote:

Originally Posted by Greg in France

On a pre facelift HE (different sender) it is polarity sensitive. No idea if the facelifts are.

Yes, the earlier senders with a metal backing plate are polarity sensitive because they also ground to the tank. The later ones that are all plastic are insensitive to polarity.

Sep 13, 2020 | 08:14 AM

Vee

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From: Arlington, VA

Leave the bottom contact alone. Connect to the upper two contacts. Doesn’t matter which.

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