Brake light failure codes

[altonk]

Changed my taillights to LEDs last night haven't picked up load resistor yet but gave it a try. It went into limp mode as I expected but what a strange array of codes

I got a vcm communications failure code
A abs Pump failure code
And a vcm message failure code
It looks like they emulate major vcm failures to force ECM into limp mode

Anybody else look at the codes with a brake light out

 

[docdoru]

What type of LED's?

 

[NancysToy]

Cascading faults are common on this system. BUDS can tell the order of your faults, but my guess is that the first one was the VCM comm fault. Without a brake light signal going to the VCM (or one out of limits), the Spyder can't differentiate between blown brake lights, a wiring fault, or a loose connector. Without the right information to the VCM, it shuts down the ABS and assumes it cannot do the rest of its job, thus the remaining faults. I have no idea why they couldn't have just made a brake light warning, without limp mode, but this is they way they tied it in and programmed it, so we must work with what we have.

 

[Some Guy]

I switched my taillights to LEDs using LI1157RCZ bulbs from Amazon.

They're brighter than stock and they don't trigger any codes. I've had them on for over 8,000 miles now with no problems.

 

[Sarge707]

I switched my taillights to LEDs using LI1157RCZ bulbs from Amazon.

They're brighter than stock and they don't trigger any codes. I've had them on for over 8,000 miles now with no problems.

:agree: You can get them at Pep Boys 2 Pack for $24.99 or on line.
Pilot Automotive makes them!

 

[Campverdefela]

:agree: You can get them at Pep Boys 2 Pack for $24.99 or on line.
Pilot Automotive makes them!

Do you have those led's installed on your SE5 and they work OK? The reason I ask is that I've tried a pair of 13w super bright ones and also a few others and even with resisters I kept getting error codes.

 

[altonk]

They are superbright LEDs 4 watt 1157s. I'm gonna put a 6 ohm power resistor so they will draw 24 watts
More than the 21 watts that a 1157 filament draws

I was just surprised at the failure code sequence

It just pretends the vcm is dead

 

[Sarge707]

Do you have those led's installed on your SE5 and they work OK? The reason I ask is that I've tried a pair of 13w super bright ones and also a few others and even with resisters I kept getting error codes.

http://www.amazon.com/Pilot-Automot..._1?ie=UTF8&s=automotive&qid=1288284069&sr=8-1

Here is a link to the bulbs Many here use with great results!:2thumbs:

 

[Campverdefela]

http://www.amazon.com/Pilot-Automot..._1?ie=UTF8&s=automotive&qid=1288284069&sr=8-1

Here is a link to the bulbs Many here use with great results!:2thumbs:

Thanks for the link. Do these have a built in resistor or circuit that allows them to work with nanny.