Flashing lights, dipped lights, Help!

[jonbarrett]

Strange electrical problem. It started when the wipers failed. A 20A fuse blew and was replaced. Now the hazards and dipped lights come on, and stay on, when the ignition is on. Tried disconnecting ribbon cable but no difference. All fuses have been checked. Tried disconnecting, charging and reconnecting battery. Tried unplugging and reconnecting dip and flasher controller/relay. Any help appreciated.

[methodwares]

try the dim/dip control box in the boot above the fuel tank

[jonbarrett]

Tried that.

[marcus1970]

jonbarrett said:

Strange electrical problem. It started when the wipers failed. A 20A fuse blew and was replaced. Now the hazards and dipped lights come on, and stay on, when the ignition is on. Tried disconnecting ribbon cable but no difference. All fuses have been checked. Tried disconnecting, charging and reconnecting battery. Tried unplugging and reconnecting dip and flasher controller/relay. Any help appreciated.

Unplug the ECU...

Plug it in again after a couple of minutes

MB

[jonbarrett]

Steering, wiper and dip ecu's have been unplugged and replugged. No difference. Does this look like a steering ECU failure?

[JensenA]

Check all the other fuses - I once (uknowingly) blew the cigarette lighter fuse, and the hazards and main beam came on, had me confused for ages!

[FUBAR]

JensenA said:

Check all the other fuses - I once (uknowingly) blew the cigarette lighter fuse, and the hazards and main beam came on, had me confused for ages!

Exactly the same thing happened to me when I stuck one of those cheap eBay TVR cigarette lighters in ()

Turned out that I had actually blown 4 fuses. All replaced and problem solved

[JensenA]

FUBAR said:

JensenA said:

Check all the other fuses - I once (uknowingly) blew the cigarette lighter fuse, and the hazards and main beam came on, had me confused for ages!

Exactly the same thing happened to me when I stuck one of those cheap eBay TVR cigarette lighters in ()

Turned out that I had actually blown 4 fuses. All replaced and problem solved

That's exactly what caused mine to blow !

Edited by JensenA on Thursday 7th June 20:40

[FUBAR]

Bastards

[jonbarrett]

All fuses checked and OK.

[Byker28i]

One of the relays, aux ignition control perhaps?

[Byker28i]

Hum - seen this?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Edited by Byker28i on Thursday 7th June 23:00

[FUBAR]

Byker28i said:

Hum - seen this?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Edited by Byker28i on Thursday 7th June 23:00

Byker, as a newbie (), you are forgiven for not knowing NJW77 was my old login

[hugepiece]

how about resetting the light control box in the boot? My sidelights are also permanently on, this is my next thing to try. Tried the dim/dip box and made no difference. Is there someone else local to you who you can swap control boxes with as a test? will be cheaper than getting new ones one at a time until you find the prob.

[jonbarrett]

Good news everybody.

I managed to get another Steering ECU which has solved the problem.

For everyone who has helped and any future problems here is what I think happened. Wiper motor short caused 20A fuse to blow. According to the fuse list and wiring diagram this fuse also protects the 12V feed to the Steering ECU PCB. (Not sure whether a motor and PCB should share the same fuse. Bad design?)

Spike has damages Steering ECU where the wiper, dip and hazard circuits mix. The Steering ECU seems a simple, single-sided, through hole board. I plan to strip the board and test the components to see which has/have failed. The passives should be simple to find but it's likely the actice devices will be obsolete. There should still be some out there somewhere.

Does anyone have access to the hex files for programming new devices? If I can find which part is damaged and manage a fix I'll come back to this post with my results.

Next job is fixing the wiper motor. I have a new park switch but it might be the windings. Has anyone got experience of rewinding these motors? Also, can other designgs of wiper motor be used? If so a description and partnumber would be really useful?

Thanks for the help.

[Byker28i]

Not sure how helpful but there's a Cerbera wipermotor on Ebay at £150

http://cgi.ebay.co.uk/TVR-Wiper-motor-fits-Griffit...

[jonbarrett]

Saw that. It looked a bit expensive, but I've never had to buy one so it might be good value.