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What's this plug?

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Old Oct 26, 2025 | 10:59 AM
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Ndb270
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What's this plug?
What's this grey plug for? Tan wire runs from it to the alt plug and back to the ECU.
88 TBI camaro harness.


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Old Oct 26, 2025 | 11:22 AM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: What's this plug?
Looks like temp head switch controlled fan relay
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Old Oct 26, 2025 | 12:31 PM
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Car: Yes
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Re: What's this plug?
fan relay
​​​​​​​
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Old Oct 26, 2025 | 12:32 PM
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Re: What's this plug?
Why would that have anything to do with the alternator though?
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Old Oct 26, 2025 | 12:49 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: What's this plug?
see schematic below
Last edited by Tuned Performance; Oct 26, 2025 at 12:53 PM.
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Old Oct 26, 2025 | 12:53 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: What's this plug?

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Old Oct 26, 2025 | 02:01 PM
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Re: What's this plug?
10 4 didn't know they shared a fuse. Thanks all!
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