really need wiring diagram for 1990 Chevy Beretta GT 3.1 liter V6

Have a flashing light? Gauges acting funny? Bad idle? Get your problems solved...
Post Reply
LisaMartinez
Registered User
Posts: 35
Joined: Sun Sep 29, 2019 6:35 am
Location: San Jacinto, CA
Contact:

really need wiring diagram for 1990 Chevy Beretta GT 3.1 liter V6

Post by LisaMartinez »

Really need wiring diagram for 1990 Chevy Beretta GT V6 3.1 liter. Need to know where the rpm signal comes from. And if I can check injection pulse at Connected or PCM??


User avatar
Rettax3
Registered User
Posts: 1810
Joined: Mon Oct 22, 2012 3:34 pm

Re: really need wiring diagram for 1990 Chevy Beretta GT 3.1 liter V6

Post by Rettax3 »

PM replied to for the RPM (Tach) signal info... Yes, you can check injector-pulse at the injector-harness four-pin connector, or even the PCM, the noid-lights just don't plug in to either harness like they do the injector connector.


1989 SuperCharged 3800 Srs-II (First)Six-Speed GTU
1990 Turbo 3.4 5-Speed T-Type
1990 4.0L 4-Cam 32-Valve V-8 5-Speed Indy GTi (Project)
1990 Stock(!) 3.1 MPFI Auto Indy
1995 LA1/L82 4T60E Z-26
1995 3.4 DOHC Turbo 5-Speed Z-26
LisaMartinez
Registered User
Posts: 35
Joined: Sun Sep 29, 2019 6:35 am
Location: San Jacinto, CA
Contact:

Re: really need wiring diagram for 1990 Chevy Beretta GT 3.1 liter V6

Post by LisaMartinez »

2010-07-02_012635_3.1_ECM_fig4.gif


LisaMartinez
Registered User
Posts: 35
Joined: Sun Sep 29, 2019 6:35 am
Location: San Jacinto, CA
Contact:

Re: really need wiring diagram for 1990 Chevy Beretta GT 3.1 liter V6

Post by LisaMartinez »

This diagram matches, I'm familiar with this graph so if you were to say C12 wire I'd be familiar, quick learner


Post Reply