MyE28.com

TheYoungSir wrote: Jun 30, 2022 5:29 PM

cek wrote: Jun 24, 2022 12:49 PM

virginpilot wrote: Jun 23, 2022 8:13 PM Thank you everyone for your advice! I’ll definitely do that. My e12 is garaged and only goes out in fine weather and at the moment it’s cold and wet here in Melbourne, Australia so I definitely won’t be rushing it! I’ll order one later today. I don’t suppose there are any discount codes? I’m just being cheeky
Cheers Scott.

Sadly, we will be raising prices soon given the significant increase in component costs driven by supply-chain issues, fuel price increases, and the chaotic global situation. Just say'n.

BRRV wrote: Jul 17, 2022 2:18 PM I'm waiting for mine, ordered a while ago, but before the price increase.. and will install it in a NOS fuse box assembly that I've had for decades in the spares. I'm hoping this will cure some interesting voltage issues with instruments and so on. I'm going to add another ground off the alternator at the same time, back to earth. I keep chasing gremlins!

Alternator grounding: I'd be more inclined to redo the alternator to block line, then make a line from the driver's motor mount to the battery instead of from the alternator to the battery directly. This significantly shortens the current path to the battery for both the starter and the alternator and you avoid any chance of starter current going through the alternator-specific ground.

cek wrote: Aug 03, 2022 4:36 PM

Dgohwanger wrote: Aug 15, 2022 1:33 PM I installed mine this weekend. It looks great! Thanks, cek for the troubleshooting help!

This morning I noticed my anti-lock brake light was on...has anyone had this issue after the retrofit installation? Maybe it's just a bad sensor and timing coincidence...?

cek wrote: Aug 15, 2022 3:28 PM

Dgohwanger wrote: Aug 15, 2022 1:33 PM I installed mine this weekend. It looks great! Thanks, cek for the troubleshooting help!

This morning I noticed my anti-lock brake light was on...has anyone had this issue after the retrofit installation? Maybe it's just a bad sensor and timing coincidence...?

Likely a coincidence, but let's dive in and find out...

Using the '85 E28 ETM since you have a 1985 535i:



ABS itself runs directly from the battery (ABS ECU gets its power from the Ignition switch in RUN position, and the ABS Pump gets power directly from the battery). Fuse 12 does go to the brake switch, and when the pedal is pushed, 12V goes to Pin 25 of the ABS ECU.

I cannot find any more info on the ABS Warning Indicator on the diagrams for the instrument cluster. Never noticed this before. I checked the '88 ETM and it's not there either. Odd (maybe I'm not seeing it?).

Anyway, from the above pages, it appears the ABS Indicator light gets 12V from the ignition switch when in "RUN" via the .75 GN wire that also powers the ABS ECU (Pin 1) ("M").

The ABS Indicator light ALSO gets 12V from two other sources:

- Pin 1 from the ABS Hydrauluc unit (.75 GY/RD).
- Pin 29 BK/GY on the ABS ECU) if it detects a bad sensor amongst other things.

I don't think it's possible for that light to come on unless EITHER Pin 29 of the ECU or Pin 1 of the ABS unit is hot.

Further, I don't see any wires in the fuse box itself that deal directly with the ABS system (other than Fuse 12. See xls here: https://kindel-my.sharepoint.com/:x:/p/ ... i7Jg-h-2kg

Thus I think this is a coincidence and either

- An ABS sensor has failed (a common thing)
- The ABS pump has failed (uncommon IIRC)
- The ABS ECU has failed (uncommon IIRC)

Your best bet now is to read one of the many threads on testing the ABS sensors...

Johannensc wrote: Aug 18, 2022 11:00 PM Hey Galahad. I'm just installing mine in my e28 535 but car wont start. No LED on fuel pump fuse. Everything else seems to work. Plugs match the picture I took before. The car started last night before install

Galahad wrote: Aug 19, 2022 12:36 AM


Thanks for reaching out! No light on the fuel pump fuse means the fuse isn't being powered. The ECU controls the fuel and only turns the pump on when it sees the engine cranking, so there's probably a problem in the power delivery to the fuel pump or to the ECU. Does the car crank when you try to start the car?

Johannensc wrote: Aug 19, 2022 8:52 AM

Galahad wrote: Aug 19, 2022 12:36 AM


Thanks for reaching out! No light on the fuel pump fuse means the fuse isn't being powered. The ECU controls the fuel and only turns the pump on when it sees the engine cranking, so there's probably a problem in the power delivery to the fuel pump or to the ECU. Does the car crank when you try to start the car?

Yes it cranks! Looks like the Main Relay is getting power but not getting the signal to turn on. Same with the fuel pump relay

jc72 wrote: Sep 06, 2022 12:17 AM Just installed mine this afternoon and wanted to thank you for a great product. The most tedious part was removing the old fuse holders from the box but the install was easier than I expected.

Shawn D. wrote: Oct 01, 2022 9:57 AM Folks should understand that endeavors like the one Y'all have going are niche and are not built to have redundant systems in place, nor should they. Doing so would only drive up the cost of the low-production parts. A short wait for these is not a big deal, given the fact that decades have gone by with no viable alternative in the first place.