CDT Auto, How to fix failed reverse lights

paulonsite · 14th November 2022, 12:32

Dear all

I just repaired some failed reversing lights.

Symptoms:
I have never had the 'red light' by the auto box selector
Reversing lights suddenly failed

Investigation:
Corroded light cluster contacts on male cable end and female cluster ends
all bulbs working and in good condition
Fuse 23 intact

Method:
Replaced fuse 23 with spare from in car. No change.
Fully cleaned connections by abrasion and alcohol. No change.
Tested voltage to lights. Good 4.5 to 7V.
Did research and replaced Relay L4. No change.
Re-inspected fuse 23. Found to have corroded blade contacts. Replaced with brand new.
Lights working...and red light next to selector back!

TLDR: Conclusion
Check ALL voltages FIRST
then the fuse
replace with new
only regard a fuse as okay if it is pristine, even if intact

Hope that helps some folk.

Paul.

14th November 2022, 12:32	#1
paulonsite Loves to post ZT CDTi Auto Join Date: Jan 2012 Location: Birmingham Posts: 294 Thanks: 93 Thanked 30 Times in 19 Posts	CDT Auto, How to fix failed reverse lights Dear all I just repaired some failed reversing lights. Symptoms: I have never had the 'red light' by the auto box selector Reversing lights suddenly failed Investigation: Corroded light cluster contacts on male cable end and female cluster ends all bulbs working and in good condition Fuse 23 intact Method: Replaced fuse 23 with spare from in car. No change. Fully cleaned connections by abrasion and alcohol. No change. Tested voltage to lights. Good 4.5 to 7V. Did research and replaced Relay L4. No change. Re-inspected fuse 23. Found to have corroded blade contacts. Replaced with brand new. Lights working...and red light next to selector back! TLDR: Conclusion Check ALL voltages FIRST then the fuse replace with new only regard a fuse as okay if it is pristine, even if intact Hope that helps some folk. Paul. Last edited by paulonsite; 14th November 2022 at 12:36..