Lights staying on

[K9d 108]

My neighbours 156 has a problem whereby the lights stay on all the time.

From what I can see the rear light on the drivers side is lit.

 

Any ideas as to cause and cure ?

[moon_blue 92]

I read somewhere (AO I think) that its a fault with the rev counter

[ChrisO 2]

Yes this is the well documented rev counter issue.

 

The cause is the "bulb out" warning circuit which is controlled by a bunch of chips on the rev counter - when one or more of these burn out it leaves an open circuit to one of the bulds that the system monitors (usually the offside rear lamp) - this will cause a perminent battery drain and the "bulb out" warning light will be on even though all the bulbs are working correctly.

 

There are two fixes for this.

1) Easy - replace the rev counter - one screw for the trim and two for the rev counter it's self, it should be a 5 minute job to change (assuming you can find a matching rev counter for the car, but Smaky can advise if any are interchangable)

2) Hard - remove the rev counter (as above) take it apart and replace the blown IC chips - there are serveral write ups regarding how to do this on the AO website along with details of the chips required - search the 156 forum area for Rev Counter issues.

 

Chris

[K9d 108]

Cheers

 

I will pass this information on, I know where there is a dead 156 that may have a spare rev counter.

[Smaky 73]

Cheers

 

I will pass this information on, I know where there is a dead 156 that may have a spare rev counter.

 

If that is the devizes scrappy it's a JTD

[K9d 108]

 

If that is the devizes scrappy it's a JTD

 

No I meant the dead one with the hideous lights in Lyneham

[Smaky 73]

 

If that is the devizes scrappy it's a JTD

 

No I meant the dead one with the hideous lights in Lyneham

 

Nope that's gone.

[K9d 108]

That options out the window then.

 

If it was me I would just take the bulb out.

[ChrisO 2]

that is a temporary fix, but not a long term one.

 

Just seen a couple of Rev counters on ebay plus there must be 5/6 cars being broken.

[jhc 28]

 

I replaced a LOT of bulbs (including the sidelights) on my 156 because the bulb out light was always on...

 

[Smaky 73]

Number plate lights are always overlooked.

[Guest]

Just had the same thing on my 156 ....

Took 3 hours and £42 to sort, but all is well.

Managed to get one local, but a bit steep, I thought.

Really is easy to do, 3 screws and 2 "idiot proof" connectors (only go in 1 way!)

If you can't get one local, try the parts websites, they usually deliver next day and are mostly good to match parts correctly.

Good luck!

[K9d 108]

It's not my car that has the problem, have passed the info on to my neighbour.