How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Marty Your Own Question
Marty
Marty, European Car Expert
Category: UK Car
Satisfied Customers: 404
Experience:  ASE & Bosch Certified Master Tech. Over 30 years experience.
13230946
Type Your UK Car Question Here...
Marty is online now
A new question is answered every 9 seconds

I am looking for someone who could confirm a have a short in

Customer Question

Hi, I am looking for someone who could confirm a have a short in engine electronics or not.
The car is Vauxhall Astra H 1.4 XEP, 2007 and I would like to talk about this particular model only, please as I know that on some other cars the situation like described below could indicate a short.
Removing fuses and measuring voltage on both legs of terminals (only those I suspect have short):
Ignition OFF: ---------- Ignition ON:
F6 - 12V, 2V ----------- F6 - 12V, 3.6V
F21 - 0V, 0V ----------- F21 - 12V, 11V
F22 - 0V, 0V ----------- F22 - 12V, 0.7V
F26 - 0V, 0.03V ------- F26 - 12V, 3.5V
F27 - 0V, 0.1V --------- F27 - 12V, 0.1V
F30 - 0V, 0V ----------- F30 - 12V, 0V
F35 - 12V, 11V -------- F35 - 12V, 10VOnly one fuse removed each time for a test above.
The engine starts with F21 removed.
When removed F26 and F21, ignition ON, voltage on F21 terminal: 12V, 0.5V
Submitted: 10 months ago.
Category: UK Car
Expert:  Gary replied 10 months ago.

Hi there,

Can you tell me what is the problem with the car?

And what codes are stored?

Then I can help you.

Gary

Customer: replied 10 months ago.
Thanks for response. I am looking for someone who could confirm the values I have measured are normal on the same car as mine. At least on fuse 21. If they are not right then I will probably know what to do.
Expert:  Gary replied 10 months ago.

Sorry I haven't got a car to compare to.

I can see what you are talking about, but I can't see what you trying to diagnose.

What is the problem with the car?

What codes set in which modules?

Gary

Customer: replied 10 months ago.
I would not like to talk about diagnosing because I have already diagnosed the car so an ignition coil pack was replaced (short to ground) and an engine ECU went for repairing (could not set the throttle).
I will only credit someone who can open a bonnet, open the fuse box, remove F21 (then possibbly the rest fuses), turn ignition ON, measure voltage on both connectors separately in a fuse terminal (on a good working car). I will provide more details on type of a fuse box in my car if needed. (there are two types I guess). Second option is someone works on Vauxhall cars and know the values I have measured are correct.
Expert:  Gary replied 10 months ago.

Sorry I could not help you today.

Another tech will be with you soon.

Gary