Thread: Bosch 024 on 93 classic

White wire with black stripe and its little black box ERR4019 should be connected to the NEGATIVE (1) side of the coil, as this is the pulse input to the ECU so as it can enable injection. The connector should be the giveaway as it is a male connector into a female brass connection to the coil. Any gas trigger wire should be connected here too, as well as the trigger wire from the Bosch module.

The +(15) side of the coil should be fed with +12V from the ignition. It is usually a plain white wire. That should be the wire going into the loom, test this for +12V with the ignition on, but disconnected from the coil.The suppressor should be connected here and the +12V feed to the Bosch module.

I also remind you that any loose connectors around the coil are a disaster. Use only covered terminals or wrap them in tape, also squeeze them gently with flat pliers to tighten them up.

Thanks
Will go and do a couple of more checks and report back my findings

Regards John

Also thanks for the info on your fridge, soon as I save enough I'll be looking for one.
J

Back again

I have found the power delivery, it comes from the white wire that passes through the ERR4019 this connected to +15 it also powers (T junction somewhere in the loom) the module on the dibby, the white wire with the black stripe is correct as the pulse wire, and the shrouded white wire that disappears into the maf loom I assume is the ecu pulse, the brass connector is as you described with these two wires attached, what is the function of the ERR4019???

I had intended to cut and replace the ends from the existing loom but now feel this may not be wise as one terminal on the bosch module 3 or 7? would be vacant.

Should I leave the ERR4019 in the circuit or feed the power direct to the coil, I'll make a new loom from the module to the dibby.

Thank you
John

Originally Posted by Jhonno

Back again

I have found the power delivery, it comes from the white wire that passes through the ERR4019 this connected to +15 it also powers (T junction somewhere in the loom) the module on the dibby, the white wire with the black stripe is correct as the pulse wire, and the shrouded white wire that disappears into the maf loom I assume is the ecu pulse, the brass connector is as you described with these two wires attached, what is the function of the ERR4019???

I had intended to cut and replace the ends from the existing loom but now feel this may not be wise as one terminal on the bosch module 3 or 7? would be vacant.

Should I leave the ERR4019 in the circuit or feed the power direct to the coil, I'll make a new loom from the module to the dibby.

Thank you
John

Disconnect the err4019 from the supply wire and take the white wire direct to the coil. I'm sure the err4019 should be in the pulse wiring instead. At least that's how its been on all the disco's I've wired up to Bosch modules. All terminals of the Bosch module must be wired, and the module and heat sink securely earthed (the right hand screw hole is the earth point). The Lucas amp must be removed from the dissy and a harness made to connect to 3 and 7 as per the pics:

Morning

Thanks for the info.

It would appear that the wiring is original, who Knows???. Wish I could find out what the ERR4019 is and it's function, Thought maybe it was a diode to stop any chance of chatter from the coil affecting the module seeing they are both powered from the same feed, OH WELL onward and upward, rebuild the dibby I am going to use a pickup from an earlier model as the wiring is colour coded, (work off my 87) easier to get it right first time around. Looking at your pics they have changed the size of terminal 3.

Will upload a couple of pics later today of the completed job.

Run a multi meter across the err4019 and see if it's just a resistor.

Up and running. goes like a dream, Murphy struck again, timing light decided to die before I could finish setting, so ear for the present. Haven't checked out the ERR4019 yet, tomorrow maybe.

Three photos of the finished job, decided to run an earth from the sink retainer to an earth pole for good measure.

ERR4019 is indeed a diode pack. I'd say you're correct in that it's to filter HV chatter - not sure why only fitted to 92/93 models though. There's one in my 1971 Mercedes - between coil and tacho - remove it and the tacho needle jumps around randomly ....