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Astra J Rear Light Issue

16K views 8 replies 4 participants last post by  redman  
#1 ·
I have Fault 21 showing on my display, which is an issue with the passenger side tail lights. I have replaced the bulbs in both the car body cluster and the boot cluster as suggested in other posts I have found, but I am still having the issue.

I am guessing I have a faulty wire somewhere, as either both lights work on the left hand side, or neither lights work. They are very intermittent.

Has anyone got some easy-fix suggestions to try before I bite the bullet and send it into the garage tomorrow?

Many thanks,
 
Discussion starter · #3 ·
I have Fault 21 showing on my display, which is an issue with the passenger side tail lights. I have replaced the bulbs in both the car body cluster and the boot cluster as suggested in other posts I have found, but I am still having the issue.

I am guessing I have a faulty wire somewhere, as either both lights work on the left hand side, or neither lights work. They are very intermittent.

Has anyone got some easy-fix suggestions to try before I bite the bullet and send it into the garage tomorrow?

Many thanks,
Hi
Is your left hand front sidelight affected? as it is fed from the same positive wire. According to the wiring diagram I have, both left hand clusters have different earth points so unlikely to be that.
Make sure there is no corrosion on the terminals of the light units and their associated connector. Are the bulbs a good snug fit?
I have no issues with the front lights. Everything seems in a good state of repair to a novice like me. Bubs were all snug too.

Thanks for your suggestions! ?
 
Discussion starter · #5 ·
Thanks for your help on this one. I tried each of the things suggested but took it to the garage in the end. They managed to blow all four bulbs in the cluster (twice) before deciding it was shorting out. They traced the wire and found a break in it (though they did not note down where...).

Thanks again,

Stu