B C Posted October 3, 2017 Author Report Share Posted October 3, 2017 That's how I understand it Quote Link to comment Share on other sites More sharing options...
Daggerty Posted October 4, 2017 Report Share Posted October 4, 2017 Ok, I like to tell people at my work about my car plans, because they tend to ask you consistently why you aren't driving that car to work. B C 1 Quote Link to comment Share on other sites More sharing options...
B C Posted October 4, 2017 Author Report Share Posted October 4, 2017 Im getting more acquainted with my ground-based spaghetti monster (as opposed to the flying variety). Off the top of my head I think all I have left to identify are the connectors for the: -Vanos solenoid -oil pressure switch -TPS Aaaaand a whole bunch of ring terminals, grounds, and things I may wrongly identify as grounds which will fry something. (Halp!) Quote Link to comment Share on other sites More sharing options...
jc43089 Posted October 4, 2017 Report Share Posted October 4, 2017 Oil pressure switch has only one prong TPS has 3 vanos - I can't remember I can go take pics of my car at lunch if that would help. Quote Link to comment Share on other sites More sharing options...
B C Posted October 4, 2017 Author Report Share Posted October 4, 2017 Between the idle control valve and the TPS, they are both 3 pin with RED YLW GRN rastafari wires so I will need to trace those back to the ECU connector If you can take a picture of the battery power block that would be beneficial [emoji1303] Quote Link to comment Share on other sites More sharing options...
jc43089 Posted October 4, 2017 Report Share Posted October 4, 2017 Will do, yell at me if I forget. Quote Link to comment Share on other sites More sharing options...
Jdesign Posted October 4, 2017 Report Share Posted October 4, 2017 Ahh yes. Wiring. the best part Quote Link to comment Share on other sites More sharing options...
Daggerty Posted October 4, 2017 Report Share Posted October 4, 2017 When in doubt ground it out Quote Link to comment Share on other sites More sharing options...
B C Posted October 5, 2017 Author Report Share Posted October 5, 2017 What is a 3 pin connector that isnt for the TPS or idle control valve? Remember this is OBD1. Could it be the oil level sensor? I havent checked to see if thats a 2 or 3 pin connector. I will also be wiring the CEL so that it works properly Quote Link to comment Share on other sites More sharing options...
KaiserRolls Posted October 5, 2017 Report Share Posted October 5, 2017 Cam sensor is 3 prong Vanos solenoid is 2 prong CPS is 3 prong Intake mani is 2 prong Oil pressure is 1 prong TPS is 3 prong ICV is 3 prong E36 coolant temp sensor for ecu 2 prong M20 coolant temp sensor for cluster is 1 prong, but the harness has a 2 prong connector Knock sensors are 2 prong (3 spaces though) Purge valve solenoid guy is 2 prong I forgot to look at my e34 pan for the level sensor- don’t think my harness has a provision for it though (haven’t seen any stray Bosch style connectors) B C 1 Quote Link to comment Share on other sites More sharing options...
B C Posted October 5, 2017 Author Report Share Posted October 5, 2017 I am pretty sure it is the oil level sender, which leaves one connector with two pins that is wired into the X20 connector, and all the +/- ring terminals. I just cant trust that all the black wires are grounds and all the red wires go to the battery block so I will spend tonight tracing those all back to the connectors. There are also a couple connectors that clip into the harness bracket under the manifold. I need to find out which connectors fit into those spots (on the M20 it was the crank position sensor and the cylinder reference sensor) and get an idea of how the harness is supposed to lay/mount in the bracket. If anyone has or can find a good photo of an M50/S50 under the intake manifold it would be much appreciated. I'm just seeing a lot of pictures that are OBD2 or are obscured by the spidey hose The wiring harness sleeves are a little tedious but very satisfying, thanks to Mitch for introducing them to me. I picked it up from Pegasus m42b32 and Jdesign 2 Quote Link to comment Share on other sites More sharing options...
KaiserRolls Posted October 5, 2017 Report Share Posted October 5, 2017 The knock sensor connectors are secured into a bracket and oppose one another. Right under the icv. The other connectors that “slide” into brackets are the crank sensor and maybe the vanos solenoid wire? And cam sensor maybe? Quote Link to comment Share on other sites More sharing options...
jc43089 Posted October 5, 2017 Report Share Posted October 5, 2017 I have the worst memory known to man. I didn't take a pic of the power block, text me tonight and I can take a picture of my other e36 engine that is sitting in the garage on a furniture dolly, it will be easy to see where the harness goes. I pulled it with the harness attached. So it is laying in the tray like it is supposed to be. Mine won't have the oil level switch but otherwise should be just like yours. B C 1 Quote Link to comment Share on other sites More sharing options...
B C Posted October 5, 2017 Author Report Share Posted October 5, 2017 Awesome that would be great! Quote Link to comment Share on other sites More sharing options...
GunMetalGrey Posted October 5, 2017 Report Share Posted October 5, 2017 The only ground wire that ends in an eyelet is the one that is part of the diagnostics connector. The other wire is red under the sheathing, and as thus goes to the positive terminal, along with the cable from the starter. This is per my memory so I would verify. E36 or E34 Harness? I need to stop at the shop tonight and can verify a couple connections if need be. If you have connectors in question just check continuity from pins on the ecu to find what they are, easiest way in my opinion. Quote Link to comment Share on other sites More sharing options...
jc43089 Posted October 5, 2017 Report Share Posted October 5, 2017 Also the ground eyelet that goes to the m8 bolt on the front engine lift point. It is a short wire that comes out of the end of the injector wiring box thing. B C and GunMetalGrey 2 Quote Link to comment Share on other sites More sharing options...
B C Posted October 5, 2017 Author Report Share Posted October 5, 2017 I’ve had a few valve cover gaskets and head gaskets delivered to my house in the past few years. My wife is catching on: HipMF, patsbimmer1, m42b32 and 4 others 7 Quote Link to comment Share on other sites More sharing options...
Jdesign Posted October 5, 2017 Report Share Posted October 5, 2017 16 minutes ago, Snap said: I’ve had a few valve cover gaskets and head gaskets delivered to my house in the past few years. My wife is catching on: DED. HAHAHHAHAA. Also I like the new title of your thread. Quote Link to comment Share on other sites More sharing options...
B C Posted October 6, 2017 Author Report Share Posted October 6, 2017 Many thanks to JC and Kaiser for the pics they sent last night! The alternator and starter wires were identified as well as the ABS unit power wire which is needed for a 24V swap. There is still a mystery 2 pin connector in the same loom as the O2 sensor connector which could possibly be for the reverse light switch? but it seems strange for that to be caught up in the engine harness instead of one of the chassis harnesses. I stand a much better chance of getting the engine fired up without having to troubleshoot things now. I will take one last look at the remaining connections and see what I can make of them, install the harness on the engine and move on to the clutch and trans tomorrow. Jdesign 1 Quote Link to comment Share on other sites More sharing options...
GunMetalGrey Posted October 6, 2017 Report Share Posted October 6, 2017 1 hour ago, Snap said: Many thanks to JC and Kaiser for the pics they sent last night! The alternator and starter wires were identified as well as the ABS unit power wire which is needed for a 24V swap. There is still a mystery 2 pin connector in the same loom as the O2 sensor connector which could possibly be for the reverse light switch? but it seems strange for that to be caught up in the engine harness instead of one of the chassis harnesses. What year is your chassis? Quote Link to comment Share on other sites More sharing options...
B C Posted October 6, 2017 Author Report Share Posted October 6, 2017 1991 Quote Link to comment Share on other sites More sharing options...
KaiserRolls Posted October 6, 2017 Report Share Posted October 6, 2017 Even though we already spoke. This ones for the lurkers Quote Link to comment Share on other sites More sharing options...
GunMetalGrey Posted October 6, 2017 Report Share Posted October 6, 2017 1 hour ago, Snap said: 1991 That explains why I've never dealt with the ABS wiring! Quote Link to comment Share on other sites More sharing options...
B C Posted October 7, 2017 Author Report Share Posted October 7, 2017 After about 6 hours of working on it, its complete. Everything accounted for and labelled, degreased, rewrapped in new sleeving, a few new wires run, a few wires terminated, all ring terminals replaced, and all pins cleaned up. Boris3, Earl, suspenceful and 3 others 6 Quote Link to comment Share on other sites More sharing options...
Earl Posted October 8, 2017 Report Share Posted October 8, 2017 Want to do mine? Quote Link to comment Share on other sites More sharing options...
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