Mud-club
Vehicle & Technical => Range Rover => Topic started by: rangyholic on August 14, 2007, 19:26:30
-
Hi all, my speedo hasn't worked since i got the rangy, its an 1988 auto v8.
Is there something which commonly fails, or do i just have to work through the system to find the culprit............
thanks for any help you can offer.....jamie
-
I had this with a 87 RRC turned out to be the "L" drive on the back of the speedo, hope this helps
-
Had the L drive suffer on me too, as it failed (took some time to finally stop) it produced a clicking sound as the gears skiped. We just pushed it back together and recrimped the end cap back in which had come lose.
Another time a speedo failed the needle wounldn't drop below 50 so most of the time it never moved, this was a solved by fitting a new in dash speedo unit.
Check the cheap things first though before spending too much money in case its just something like the speedo cable has broken.
-
Mine isn't working as well.
But
My rev guage is also not working when I start (3.9 efi 1991) it jumps up and thats it.
Rich
-
Mine isn't working as well.
But
My rev guage is also not working when I start (3.9 efi 1991) it jumps up and thats it.
Rich
I assume like a lot of rev counters on yours its run off the alternator, so check the conections to the alternator for a start as it could just be a dodgy connection.
-
Ok, I see a couple of you have a problem here, so to clarify.
If on the 1988 model you have the rev counter that only covers 2/3 of a revolution and the 4 5 and 6 are in a straight line then it's the early type and ddriven by a speedo cable. I'm desparatley trying to picture it in my head and I've been driving one all day. The rev counter as said works from a thin wire on the back of the alternator.
If you have the 1988 onwards model, the Hot-Wire EFi in fact then you may will have the electronic speedo which is layed out more like a conventional speedo but is driven by the road speed sensor that is part of the EFi system. If the road speed sensor fials you may get an EFi warning light and on later models the air suspension will go into limp mode too. The cruise control will also not work.
The original hot-wire had the sensor for the EFi and a mechanical speedo, so there are 2 cables, the sensor is a drive-through unit fastened to the N/S chassis leg, on later models the output is just blanked. Later the cabel and sensor were replaced by a smaller sensor in the gearbox itself, I'd only expect to see that on a softdash.
So, the most common fault on a mechanical is likely to be the angle drive at the back of the speedo head or a cable that has slipped to one end. Typically this may be proceded by the speedo jumping at low speeds.
An electronic speedo could be the speedo head or the speed signal which is processed by a unit the size of a flassher relay and IIRC is white. Don't ask me where it is at this time of night though :roll:
-
Range rover blues
That could be why I can't see a speeco cable in my dash pod then. Will have a look today.
Rich
-
Thanks for all the helpful replies peep's, will look at it over the next couple of days while i'm off work 8)