Hey Ray I also have a 98 and was wondering what exactly you purchased to make this conversion as the 98 has the EBCM in the rear vs the later models in the front?
I'm not sure if the 98's had active handling or not but does yours and if so do you know whats the difference and how to convert to active handeling?
Any info you can provide would be much appreciated. Also if you happen to have pictures of the connectors and the way you wired that would also be appreciated.

 

So is that correct? 2000’s without AH cannot be converted, or did I misread?
Mines needed to be done for a while.
I was just getting a bit more optimistic, seeing that a few people had done the conversion now
Then I see that mine can’t be done!
Say it ain't So!!

 

I have a 98 Indy Pace Car with active handling and the ABS unit is in the front like the 99. I don't have any help for those with rear mounted ABS units. Sorry. After the conversion, mine kept throwing codes c1293 and c1296. I fixed that by reversing the gray and orange wires going to the brake fluid pressure sensor. Mine also had a heavy ground wire to the pump motor not mentioned in the write-up for the 99. I had to connect that wire from the main harness to pin G of the new connection else the pump would not work.

 

Hi Ray, my ebcm has burned itself out somehow and the connector and wires all melted so I’m now compelled to do the conversion. I’ve been looking at buying the parts including the loom, but can you please tell me how you have dealt with the vast difference in wires? Mine has more than 30 wires whereas the 2001+ has a far smaller connector and much less wires.
Where do they all go? Mine is front mounted btw.
Thanks Andy M

 

damn lol howd you manage to do that

 

Hey buddy, I’m not really sure how it happened.
it was on properly with no leakage. Looks to have started on the left side of the plug, where there’s the heavy duty live. Luckily it didn’t set on fire. I don’t understand how it could burn up without blowing any fuses??
Anyway I really hope someone can help with figuring out how to manage the wiring. I’m missing some of the picture because I don’t have the 2001 books. I can’t figure what difference they have made to the loom in order to accommodate all the necessary circuits.

 

I see the label is an "M" which means you do not have active handling. If the label had a "V" you could do the swap for the later unit but since you do not have active handling you will need to buy a used "M" unit for a 97 - 2000. To replace the connector you will need to buy a partial harness if you can find one. Another option would be to buy a Kent_Moore J-39700-25 adapter. These can be founld on Ebay for less that $40. The wires in the adapter are all black so you will need to use a multi-meter to test continuity to find which pin each wire goes to and label it. There are also a set of white wires you will need to cut all of these off. You will see what I am talking about if you get one. It's not as hard as it may sound.

 

Thanks Ray, you’re not inspiring me with confidence here. It’s difficult enough for folks in the states to find a module that really works, my chances are slim to non.
Looks like I’ll be changing my shocks and pulling a couple of idiot light bulbs.
Thanks again.

 

I have this sort of patient coming in and I was wondering: Is it a must to put the 2001-2004 EBCM to it's place in engine bay? How about if it's placed in the rear cradle as it was originally in 1997?
Are the brake hard lines suitable for this idea at all? To me it seems the plumbing is the most demanding task and to do it properly it would mean I would drop the driveline completely for that. Modifying the harnesses and adding wires would be easier.
This patient is Lingenfelter twinturbo with modified turbo's and it seems the engine bay is "fully booked" already.

 

I believe it would be better to put the newer EBCM in the back where the original one was. Much easier to hook up the wires and brake lines. You would have to make a new mount for the new EBCM so I hope you're good at fabricating.

 

I can't thank you enough for doing all the work to figure this out. I did the conversion about a 1 1/2 years ago and it has been working great. I haven't had any issues except for some bad soldering that I did. The system works awesome. Just wanted to let anyone know that this works and is defiantly worth the time it takes to do it.

Thanks again
Eric

 

Hi All, my wifes 99 non-AH car just gave its first service abs and traction control system on her car. Have we got anyone who has added AH to a non-AH car in order to make this function? Or, found a work around to use the late model ecbm without its AH functionality.

Cheers

 

My 98 was an Indy Pace Car and had the EBCM in the front. I have since sold it after getting everything working. Waiting on my C8. I would advise you to put the new EBCM in the rear where the old one was. All hook-ups would be the same but you would need to make a new mount.

 

I also would like to do this MOD, I was hoping some super smart guy would start making kits for this!!!!
I would think it would be far easier to modify the brake lines and adding a section flexible brake hose on all the ends rather than installing and fabing up all new lines.

 

before i do the conversion , just checking to see how the conversion you did is holding up. eveything still working correctly ? Thanks

 

Has anything come up yet on a conversion for the early M code EBCM?

 

Thanks for posting this! I have a 99' it's running strong just surpassed 92k. I talked to a local shop about in the future doing this, and he mentioned that he has done this conversion and it did work for his clients. So that is reassuring.

 

Looked into this years ago. The issue was never that it could not be done, it was the liability involved in doing it. No company is going to do this because the possibility of being sued if something goes wrong. He posted the instructions on doing it and it appears to be working without issues. That is awesome and congrats on the work and posting it. Leave it at that, his instructions are out there. Very awesome.

 

Just got the dreaded “service ABS, Service traction control” after reading numerous posts, articles, etc… what exactly is the solution?
im fairly confused, the conversion seems as costly as obtaining a replacement EMBC unit?

 

I have a 98 with the front mount EBCM WITHOUT JL4 Active Handling. My EBCM has just melted down, and I'm not keen on replacing the harness, EBCM and BPMV with used 97-00 units that are likely just as bad.

The only "missing" parts mentioned so far are the yaw and lateral accelerometer. Looking at the 01 wiring diagram, these look like simple analog sensors. They both have reference 5V, reference GND, and a signal wire. The sensors only have 3 wires, they don't talk to anything else. What's to stop me from just buying these sensors and attaching them to the 01+ EBCM I wonder? I bet the harnesses are even there ready to attach to the sensors.

The 98-99 wiring diagram I have doesn't have yaw and accel at all... I'm thinking this is just missing the JL4 option, I don't know where these diagrams came from or how complete they are. I need to get a proper 98 manual. The 98 manual does list the same trouble codes for yaw and accel sensor problems as the 01 manual, with the same text exactly. The voltages and error thresholds are all the same. I haven't found different part numbers for the yaw sensor for any of the years. I bet they're exactly the same.

The Request Torque and Delivered Torque signals seem to be the same in the 98 and 01 manuals - both PWM. Makes sense, both have Traction Control. The descriptions are a bit different for trouble but I bet they work the same:My 98 harness does appear to have those two wires going into the EBCM, for the Traction Control my car does have. Both years have the same trouble codes for malfunctions on these wires. We know that late model PCMs can be re-pinned and work in an early car, so I doubt these wires are doing new things in the JL4 cars. My understanding is that Active Handling uses Traction Control first, then adds Active Braking, which is contained within the EBCM anyway - no need to tell the PCM about it.

Finally, there's also the serial data wire. This just seems to run between the EBCM and the cluster though, so maybe no need for the EBCM to talk to the PCM and discover my car isn't JL4..?

I'm really thinking that Active Handling is just contained within the EBCM and the two sensors. I would think changing from non-JL4 to JL4, the cluster would be the same and just respond to the JL4 messages the EBCM sends. The 01 description seems to agree with this:Can anyone with experience in this system see any flaws in my logic? Has anyone tried non-JL4 to 01 EBCM yet? My car can't go on the road until I can show the ABS lights going out. I'd like to get this working!

I need to go through the wiring diagrams, the wires in my 98 harness, and compare to the wires from the original post.. but does anyone know of any other missing wires beyond the yaw and accel sensor wires?