[GeoTrecco]

T4 2.5 TDI ACV returned from having some work on fuel pump. Timed & working fine now.
The battery was dead for a while and replaced (800A 95Ah).
Problem: The speedo is reading zero at all speeds and the tachometer is not counting up.
All other dials & displays are fine. Mechanic can't remember unplugging gearbox sender. Going to have a proper look underneath end of this week.
Anyone got any ideas about what to look for meantime? Disconnect/ reconnecting battery didn't make a difference.
Insight most gratefully received, thanks.

 

[Sparkhunter]

Hi,

here it is: https://t4-wiki.de/wiki/Geber_G22_(Geschwindigkeit)#Ausbau
It's in german language but there are many pictures could help. What you need is the G22 (Geber=sender). It's placed on the gearbox, behind the engine, maybe covered by an isolation cover. The proper place is depending the gearbox type. I think you have 02G box.

Under/inside the shiny thing on the right side:

 

[GeoTrecco]

Sparkhunter, thanks, you pointed me in the correct direction.
The three sender wires (black, blue/white, green/brown) were in a rubber tube but one had got broken by the gear shift mechanism. I rejoined the wire, added some more protective sheathing and wedged it away from the moving parts, so the wires can cross from back to front in safety.
Sure enough, that returned the speedo & tacho to working order. Solved - great result.

 

[Sparkhunter]

My pleasure. :tu