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Relays DESCRIPTION/Part #'s

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Old 10-09-2017, 02:28 PM
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Car: 1991 B4C
Engine: 350 cc
Transmission: Automatic
Relays DESCRIPTION/Part #'s

1991 Z28 TPI 5.7 (b4c), I need to replace the relays on bay/driver side, I need the DESCRIPTION and part numbers Please.
Thank you

The connector ( four Pins) wire colors:

Green (faded) / Orange / Brown

Black-Purple (looks like Purple)

Last edited by Williamlopez73; 10-09-2017 at 03:24 PM. Reason: missing information
Old 10-09-2017, 02:51 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Relays DESCRIPTION/Part #'s

Bye description are you meaning the two fan relays and fp relay ?
Iirc they are all the same.

Old 10-09-2017, 03:32 PM
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Car: 1991 B4C
Engine: 350 cc
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Re: Relays DESCRIPTION/Part #'s

this one has 3 relays: from right to left = 14089936 (by description is for Fuel Pump), next 14103304 (by description is for Radiator Coolant Fan) and the last one I Don't Know, its not for Cooling Fan because I drove the car with that plug disconnected and the fan works...I'm checking all over the internet but I cant find the right info, the diagrams shows until 89, and others show a Blue color wire in the connector
Old 10-09-2017, 05:14 PM
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Re: Relays DESCRIPTION/Part #'s

Old 10-09-2017, 08:09 PM
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Car: 1991 B4C
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Re: Relays DESCRIPTION/Part #'s

OK, after reading the information you send me and doing some research in the internet, I found that your information is Correct, the three Relays are the Same for my 1991 Z28 350 (B4C) but question Why some cables have different colors AND what about the Third Relay...Is Fuel Pump? Goes BEFORE the Primary fan relay OR AFTER the Secondary fan relay?
Old 10-09-2017, 08:34 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Relays DESCRIPTION/Part #'s

Originally Posted by Williamlopez73
OK, after reading the information you send me and doing some research in the internet, I found that your information is Correct, the three Relays are the Same for my 1991 Z28 350 (B4C) but question Why some cables have different colors AND what about the Third Relay...Is Fuel Pump? Goes BEFORE the Primary fan relay OR AFTER the Secondary fan relay?



Old 10-09-2017, 09:20 PM
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Re: Relays DESCRIPTION/Part #'s

I still don't understand which one is the Fuel Pump Relay, here I'm sending you an actual picture of my Relays Bracket I just took, thanks


Old 10-09-2017, 09:30 PM
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Re: Relays DESCRIPTION/Part #'s

I think the first on the right side in this view is the fp relay. You can unplug it and turn the ignition on. If you don’t hear a pump prime it’s the right relay.


Last edited by Tuned Performance; 10-09-2017 at 09:38 PM.
Old 10-09-2017, 09:46 PM
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Car: 1991 B4C
Engine: 350 cc
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Re: Relays DESCRIPTION/Part #'s

I used to drive the car with that relay disconnected and the car started, means is the first on the left from this view, I will check it anyways I'm learning as I go sometimes is frustrating because I don't not much but I'm getting there.
Thank You!
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