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Postby stephenlevi » Tue Sep 03, 2013 11:43 pm

Hi all quite an unusual fault as occurred on 2002 vectra c 1800 petrol it has a fault of the dash failing when driving and difficulty starting the fuel gauge does no move all the time and when it dont it wont start its like its immobilised
the only faults on the car are
B3750-04 info switch open or high voltage its not on the tis system
its had a cim 2 year ago 17000 miles ago from the dealers/also the srs has a fault but had the light taped over for a few years these faults are intermittent and was looking for info or a certain procedure to attain the correct repair
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Re: VECTRA C B3750

Postby s4c » Wed Sep 04, 2013 8:04 am


What scan tool are you using? Is it possible that the code could be miss read and not listed in TIS?

Could you try a different scan tool if not using a Tech2?


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Joined: Thu May 01, 2008 10:50 am

Re: VECTRA C B3750

Postby Martinjensen » Wed Sep 04, 2013 7:31 pm

I think you must ignore the B3750 code, it is quite common on the early Vectra C models.

Maby the ABS connector is the cause, as sugested in this feild remedy.

Field Remedy: 1537
Subject: ABS wiring harness connector - Poor contact
Models: Engines: Option:
Vectra-C 2002...2003,5 All All
Complaint: Failure of instruments while driving, swinging of instruments, vehicle will not start, ABS warning lamp lights on, problems while storing trouble codes of ABS wheel speed sensor.
Cause: Poor contact of wiring harness connector ABS control unit.
Production: As of MY 2003,5, modified wiring harness connectors are implemented to production.


In case of customer complaint check the contacts of wiring harness plug ABS
to ABS control unit with the test cable which is to order.

Regards Martin
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Location: Denmark

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