Trifecta lights with no speedo & MPG gauge

[Loperamide]

Originally Posted by Purplecty

Swap the rear sensors side to side and see if you get a signal to rule them out...

Plan on doing this over weekend.

[StephenVA]

Originally Posted by Clavurion

Not a sure sign for anything but like I said earlier could point to problem on module internal wiring when the module warms up.

Since we are internet guessing, I will add that the "ABS light turns on while stopped at light" usually points to ABS module circuit failure. I have use these guys with great results:
BBA Remanufacturing Inc
300 Myles Standish Blvd
Taunton, MA 02780
United States
1 508 822 4490
Fax 1 508 822 4491
[email protected]
Home (GB) | BBA Reman

3 day turn around via FEDEX.

The UK has to have someone also who does these types of repairs.

[Clavurion]

ACTronics factory refurbished units also available.

https://www.youtube.com/watch?v=NxumtQskqTY&t=11s

[Loperamide]

i have an update for you all.

I swapped both rear and left sensors around. and the trifecta still comes on saying the rear left sensor???

[Purplecty]

So it can either be wiring, a bad ABS module or the pick up ring in the wheel bearing. I would start with what doesn't cost you and check the wiring from the harness side. BBA reman does ABS repairs for around $100 using their eBay sales if they still even offer it there...

[andrewwynn]

So this means the sensor is ok and the problem is in the wiring or inside the module. You can find the pin out of the module connector and use ohmmeter to test continuity to ensure no broken wires or you make a cross-car jumper so you can connect the left side wiring to the right side sensor.

You actually can probably skip that step because the error you are getting is not a flaky signal you are getting a no signal error.

Do you start with no lights and they come on after some time ? The internal fault with the module is often affected by heat and vibration and will have the abs work on and off

[Loperamide]

Originally Posted by andrewwynn

So this means the sensor is ok and the problem is in the wiring or inside the module. You can find the pin out of the module connector and use ohmmeter to test continuity to ensure no broken wires or you make a cross-car jumper so you can connect the left side wiring to the right side sensor.

You actually can probably skip that step because the error you are getting is not a flaky signal you are getting a no signal error.

Do you start with no lights and they come on after some time ? The internal fault with the module is often affected by heat and vibration and will have the abs work on and off

YES! first thing in the morning all is ok...and then when car reaches operating temp, and while i'm at a stand still, the lights will come on.

If i turn the car off for 10-20 mins, and turn it back on, the lights disappear, and then come back on after a while.

[Loperamide]

One other thing I wanted to ask was, do these sensors affect when the transmission shifts gears?

I was driving today around 40mph, and the transmission would not shift up and the rev counter was around 4000 rpm, and then suddenly it shifted up 2 gears at once. Did this a couple of times actually. This was AFTER i swapped the sensors around so curious if they control the gear shifting in any way?

[upallnight]

Originally Posted by Loperamide

One other thing I wanted to ask was, do these sensors affect when the transmission shifts gears?

I was driving today around 40mph, and the transmission would not shift up and the rev counter was around 4000 rpm, and then suddenly it shifted up 2 gears at once. Did this a couple of times actually. This was AFTER i swapped the sensors around so curious if they control the gear shifting in any way?

There are speed sensors inside the trans. The wheel sensors are mainly for DSC and ABS along with MPH.

[Clavurion]

DME (engine ECU) gets vehicle speed signal from rear right ABS sensor.