[T3] Mystery Miss

[Daniel Nohejl]

Jim,

Yes, I should definitely get the tape off and see what’s up. When referring to the black and white wires, I meant the ones that run from the power relay and which usually connect to the FI harness through the T2 connector. On mine, those wires end in extra long male connectors and I have yet to remove the tape to see what’s up. The ends on the FI harness are white, aren’t taped up, and they look perfect. To make things a little clearer, I’ll try to take some pictures tonight. The adapter wires I made are F-F and I always wished I could find a F-F version of the VW T2 connector or at least this in F-F

http://www.mcmaster.com/#standard-electrical-wire-terminals/=12dpff1 <http://www.mcmaster.com/#standard-electrical-wire-terminals/=12dpff1>

Daniel

> On May 12, 2016, at 12:16 PM, Jim Adney <jadney at VWType3.org> wrote:
> 
> On 12 May 2016 at 10:10, Daniel Nohejl wrote:
> 
>> Jim, to cut off the motor, I gently touched together the ends of the
>> black and white wires....I can´t recall their numbers....16 and 24?. Thing
>> is, the ends were covered in several layers of electrical tape.
> 
> Yes, 16 & 24 are the power input wires. But they should both be 
> white, so perhaps one is just stained a bit. I couldn't make out the 
> black in your photo, but one of the wires is in shadow.
> 
> Or, Joe made your new harness with a black wire there, or there's a 
> hidden splice back where you can't see it. If it's black at this end, 
> it should be black at the brain end, too. It it changed color from 
> end to end, that sounds odd, so Joe must have put a splice somewhere.
> 
> If you're just touching insulation to insulation, that shouldn't do 
> anything. In that case, the problem must be a loose connection back 
> somewhere you haven't looked yet. I trust the factory crimps, and 
> Joe's crimps are probably good, but home-made ones are always 
> suspect.
> 
> I think you're really close to an answer, but you need to untape all 
> that stuff and find out what's really loose. Push and pull lightly on 
> each of the crimps to see if one of them has a bit of play. Once you 
> find the loose one, you should be able to tighten up the crimp and 
> go. I'd still consider some sleeving, rather than tape or heat 
> shrink, to slide over those wires, just to keep them from touching 
> anything.
> 
> If your adaptor wires are M-M, I have genuine M-M VW enclosed 
> connectors which would work there.
> 
> One of those wires, 16 & 24, supplies the logic portion of the brain, 
> while the other one supplies the current to drive the injectors. 
> Bosch kept them separate because the logic stuff is sensitive while 
> the injectors demand large currents, which means lots of turn-on and 
> turn-off transients. Those transients would be likely to upset the 
> logic. That's why the main power relay is supplied directly from the 
> battery (a "quiet" voltage source) and why power is fed via separate 
> wires to the brain.
> 
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
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