318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine

Notices

Engine Tuneups, chips, wires, spark plugs.

.
» Recent Threads
95 318ti 5-Spd w/factory...
10-15-2021 08:22 PM
Last post by Mongwit
01-15-2022 08:05 PM
10 Replies, 8,886 Views
Rear Hatch cargo cover
03-08-2012 09:13 PM
Last post by vee030
01-14-2022 11:10 AM
34 Replies, 10,403 Views
Club Sport Red Millpoint...
01-04-2022 10:29 PM
Last post by J!m
01-14-2022 12:53 AM
3 Replies, 891 Views
Rhodes Racing Cage -...
07-25-2019 04:32 PM
Last post by saxman0321
01-13-2022 11:30 PM
4 Replies, 36,217 Views
Thoughts on 135 manual...
01-13-2022 03:41 PM
Last post by BMWChrisInVA
01-13-2022 03:44 PM
4 Replies, 240 Views
Age Demographics
10-30-2004 05:06 AM
Last post by Vilius 323ti
01-12-2022 09:52 AM
327 Replies, 122,438 Views
E36 compact M3 CSL style...
01-13-2015 10:54 AM
Last post by aluzjunior
01-11-2022 02:14 PM
9 Replies, 7,093 Views
Bmw compact e36 child...
02-16-2020 04:50 PM
Last post by runnr548
01-08-2022 09:05 PM
6 Replies, 14,060 Views
Air Pump Simulator for 2...
12-10-2008 02:45 PM
Last post by runnr548
01-08-2022 08:53 PM
58 Replies, 56,960 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 10-07-2020, 11:52 PM   #1
Samson
Junior Member
 
Join Date: Sep 2019
Location: Ocean Shores
Posts: 21
iTrader: (0)
Default Wiring harness short

So I had a short in at the ignition switch that fried the wires on the main harness. What kind of nightmare is this to replace? Looks like a new one is $1K, or off a donor car.

If I did an engine swap, would I normally have to swap the whole wiring harness anyhow? Cause if that's the case I'll just try and get an engine and the side stuff.

Or... Someone told me they had a similar issue, and were able to trace the wires back and replace anything damaged with fresh wires. If anyone has done this, or knows of a guide to the harness so I can pull this specific part that would help.

Anyone in WA know of a mechanic willing to tackle something like this?

Uhg, I'm really bummed. Here's a pic of the location I'm talking about. Burnt wires run up as far as I can see them.

1999 318ti
Attached Thumbnails
Click image for larger version Name:	120736835_10100637445581396_3641569588427647058_o.jpg Views:	97 Size:	60.3 KB ID:	17971  
Samson is offline   Reply With Quote
Old 10-08-2020, 03:57 PM   #2
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,070
Vehicles
iTrader: (1)
Default

Do the wires run through the firewall to the engine compartment?

An engine harness is seperate from the chassis harness. You need to repair the chassis harness. I suspect there was some chafing of the wires where they pass through the firewall, or possibly other damage from aftermarket radio installation for example.

Least expensive option is to chase it back to the source and repair the bad wires.

Note they will show heat distortion far away from the actual short point, but as long as the insulation is in tact it will be fine. Solder and shrink tubing (plus skill) will be needed.
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 01-09-2021, 05:34 PM   #3
StoneWheelRacing
Member
 
StoneWheelRacing's Avatar
 
Join Date: Dec 2020
Location: Upstate NY USA
Posts: 32
iTrader: (0)
Default Wiring Harness Swap

While putting an M52B28 into our '98 TI we purchased a '99 M3 manual trans engine harness with a few burned wires for the fuel circuit.

Harness seller says the wrong relay was put into his M3 harness and the wires for that socket/circuit burned up.

Our M52 donor was a '96 OBDII cabriolet automatic. I know, or have been told, an auto harness works in a manual car but didn't want any extra unused wires, plugs etc... hanging around.

Ill be pulling the same circuit (fuel wires, socket terminals, sockets etc...) from the 96 auto harness and setting it into the 99 manual harness.

Hopefully it arrives today so we can get started. Have solder and shrink tubing ready to go.

I do plan to pull the terminals out of the relay sockets so I can re-shrink tube the enter harness for a more factory look.
StoneWheelRacing is offline   Reply With Quote
Old 01-09-2021, 05:37 PM   #4
StoneWheelRacing
Member
 
StoneWheelRacing's Avatar
 
Join Date: Dec 2020
Location: Upstate NY USA
Posts: 32
iTrader: (0)
Default Wiring Harness Swap

Sorry about that damage. I'd give you my donor car chassis harness but I just junked it.
StoneWheelRacing is offline   Reply With Quote
Old 01-09-2021, 06:08 PM   #5
Samson
Junior Member
 
Join Date: Sep 2019
Location: Ocean Shores
Posts: 21
iTrader: (0)
Default

I actually totally lucked out. Looking into it, the wire that died was a ground. Replaced it, reinstalled everything and the car drives perfect. Not I just gotta find a S52 haha
Samson is offline   Reply With Quote
Old 01-09-2021, 07:04 PM   #6
StoneWheelRacing
Member
 
StoneWheelRacing's Avatar
 
Join Date: Dec 2020
Location: Upstate NY USA
Posts: 32
iTrader: (0)
Default

Great news!. Yeah, that's why we just settled on doing a M52B28. Too easy to get and Riot Racing has the same cams as S motors for like ~$500.

M52B28 starts at 190 hp but with cams and DME tune, and other stuff should get 300hp at the wheels.
StoneWheelRacing is offline   Reply With Quote
Old 01-11-2021, 12:39 PM   #7
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,070
Vehicles
iTrader: (1)
Default

300 at the wheels is a tall order for an S52 with about ten grand thrown at it. But it can be done.

Please post your tuning results if you can get 300 at the wheels with a cam and tune on a 2.8! (In a new thread since I just derailed this one)
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 01-11-2021, 02:12 PM   #8
Samson
Junior Member
 
Join Date: Sep 2019
Location: Ocean Shores
Posts: 21
iTrader: (0)
Default

I'd be happy with 215 and the S52 haha. Gotta find a motor and an able, affordable mechanic first.
Samson is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
S52B32US post-cat O2 sensor connections to wiring harness dynagroove Engine Swaps 0 04-11-2016 07:16 AM
Wiring Harness Questions on swaps mattydont Engine Swaps 1 12-28-2012 06:13 AM
Misc parts BUYING: Heated Seats Wiring harness e28forever Parting out & Parts (US) 3 09-13-2012 01:59 AM
heated seats wiring harness e28forever Electrical 12 08-05-2012 12:44 AM
WTB: Engine bay wiring harness (Cable Harness Sector Front) pnosker US and North America 1 08-20-2010 10:29 PM


All times are GMT +1. The time now is 10:55 AM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2022, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 94.89 k/111.46 k (14.87%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.