Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: brcinema on 26 March 2017, 11:11:11

Title: All lights dim/brighten on warm up
Post by: brcinema on 26 March 2017, 11:11:11

Then they are ok.

Battery and alternator tested out ok, mind you, this was after warm up.

Anyone come across this as I have searched?

Thanks.

72000 miles.

Title: Re: All lights dim/brighten on warm up
Post by: zirk on 26 March 2017, 12:22:28

What's the Battery Voltage doing during this period.

Title: Re: All lights dim/brighten on warm up
Post by: Andy H on 26 March 2017, 12:43:43

SAI fan partially seized and drawing excessive current? (assuming that a 4 pot actually has one of course ::))

Title: Re: All lights dim/brighten on warm up
Post by: brcinema on 26 March 2017, 13:53:21

Garage did test after warm up tbh so I don't know.

SAI fan?

Title: Re: All lights dim/brighten on warm up
Post by: RobG on 26 March 2017, 13:57:32

Try pulling fuse 29a in this pic
http://www.omegaowners.com/forum/YaBB.pl?num=1176542235

Title: Re: All lights dim/brighten on warm up
Post by: brcinema on 26 March 2017, 14:01:40

Andy might be right.
I didn't about this and there has been a weird noise from front left before this happened.
I'll av to look for seized fan then.

Title: Re: All lights dim/brighten on warm up
Post by: brcinema on 26 March 2017, 17:49:26

Cant find anything wrong at mo.

Thanks for help.

Title: Re: All lights dim/brighten on warm up
Post by: Chazza12 on 27 March 2017, 06:39:06

Its the voltage control on the Headlight ECU Control Unit, I changed the one i had and it stopped, was going to change the capacitors and a few diodes inside before replacing it but all the board is covered in electrode sealer.   

Title: Re: All lights dim/brighten on warm up
Post by: Doctor Gollum on 27 March 2017, 13:52:42

Quote from: Chazza12 on 27 March 2017, 06:39:06

Its the voltage control on the Headlight ECU Control Unit, I changed the one i had and it stopped, was going to change the capacitors and a few diodes inside before replacing it but all the board is covered in electrode sealer.

Bo lax ;)

Only Xenon fitted Omegas have a headlight ecu, being a CD, this car should have halogen lights and no ecu :y

Title: Re: All lights dim/brighten on warm up
Post by: Dave DND on 28 March 2017, 11:08:22

I would be looking at the condition of the battery earth cable where it attaches to the body   ;)