Re: 147 Selespeed won't go forwards
Checked and cleaned the contacts on the big connector and also on the other smaller ones around the selespeed unit. Then I noticed that one of the potentiometers had a chunk of plastic missing so I took it off and checked the resistance. According to the info on the selespeed info pages linked from this forum, the resistance should be 1200 ohm between A and B. Mine was 800 ohm so I rang up the ever incompetent Caledonia Warrington to ask if they had a spare. They could get me one for £95, so I took the old one apart and found some water and some muck all over the tracks. Cleaned it up, refitted it, and the car now goes into first gear. Trouble is it's now saying "Selespeed System Failure". It will drive but won't go above second gear. Is this a "limp home" function?
Anyway, I can't remember the fault code, but the interpretation is "open circuit or short circuit on position sensor". Resistance between A and B is now 2000 ohm, so it's well out of spec. Looks like I'll have to buy a new pot. Can I get one cheaper anywhere else?