Thread: 3 amigos and broken rear brake light bulb

With all the technical oddities of LR that's technically impossible as the brake lamps circuit is not linked to the SLABS ECU, my presumption is that the 3 amigos were triggered intermittently by a SVS missbehaviour and they'll come back soon and this thing with the brake bulb is coincidental... eventually if the weather became colder since then that can be a reason(presuming that it's about SVS) cos the 'inchoate' SVS circuit failure is temperature sensitive and occurs more often in warm environment

Those areas of the vehicle are unrelated. We tend to link coincidental or unrelated events as being related if they occur at the same time. It's just human nature. The most famous of these is how the triode was thought of.

Andrew as said before, merely a co incidence.
The intermittent coming on of the Amigos and them resetting after turning off and restarting symptom is often fixed by the ABS modulator option "B" fix. In a few vehicles I've done.
But check first if it is not coming on due to something else with a nanacom or similar.
Cheers Mario

Strange things do happen. A while back I wrote about my td5 revving high sometimes when stopping, blip the throttle and it dropped back. It then dawned on me that it was only doing it when reversing. I put up with it for while then found a blown reverse light bulb, replaced it and the over revving stopped.

John

Originally Posted by sharmy

Strange things do happen. A while back I wrote about my td5 revving high sometimes when stopping, blip the throttle and it dropped back. It then dawned on me that it was only doing it when reversing. I put up with it for while then found a blown reverse light bulb, replaced it and the over revving stopped.

John

This thing can have a certain explanation cos the reverse lights circuit is linked to the engine ECU through the brake switch's N/C contact nd if the blown bulb had a resistive short in it this can disturb the management cos the brake switch's N/C contact is there to reduce fuelling when brakes are applied

Originally Posted by sierrafery

brake switch's N/C contact is there to reduce fuelling when brakes are applied

Are you sure about that?

Brakes will abort cruise control, but one of the tests for slipping Auto requires hard application of brakes and flooring the accelerator and there is no evidence of a fuel cut while doing that test.

cheers
Paul

See attachment from RAVE cos it's clearer than i could explain in my rotten english.... it's not such hard action to not be able to run a stall test though, that second function of fuelling limitation occurs when the N/C contact opens.... you can feel it only if it's stuck open and i low gears, happened to me that it was stuck closed and the brake lamps were always on but it was jerky in low gears, see post #7 here: https://www.landyzone.co.uk/land-rov.../#post-1949274

TBH I haven't looked at the braking code beyond identifying the handler for the brake switches, so couldn't say with any certainty what exactly is happening.

The LR Technical Academy document for the D2 only mentions the cruise control cancelation, and not fuel limitation but this document was written for the EU2 motor. RAVE is a curious blend of information for EU2 and EU3 motors and it doesn't necessarily identify whether a specific behaviour applies to both.

I'd actually read "limits" in the sense of speed limiting a truck - it sets a maximum value that can be used. Below that limit there is no effect.

The clutch switch is an example of a "cut" - there is an immediate reduction in fuel supplied to prevent the engine revs surging.

cheers
Paul