[h2pmr]

i have a couple of digi dash's one from an 89 and one from a 90
part number stickers on them are 92864115700 and 15701

is there anyway to power them up to get a mileage to display?
i have the 4 electrical connectors that plug into them

have tried on plug 2
pins 12 &13 12v
pins 14 & 15 to ground
pins 16 & 17 12v

that gets the back lights to light up, but it just fully illuminates the 3 LCD displays and puts the oil pressure gauge to max.
as pictured
cheers
Phil

20260326_202047.jpg

[worf]

Pretty sure you'll also need 15 bus (ignition ) power to get the mileage display.

You may also need the stalk assembly connected...

I don't know for sure having never attempted this.

[h2pmr]

thanks Dave, if i get it to work i will post back on here.
cheers
Phil

[maddog2020]

Mark Anderson might have some insight into this. there is also a digital dash service manual out there

[jschiller]

Mark Anderson might have some insight into this. there is also a digital dash service manual out there

Indeed, there is:

928 S4 '89 - Diag of the Instument Cluster.pdf

[h2pmr]

Mark Anderson might have some insight into this. there is also a digital dash service manual out there

Indeed, there is:
928 S4 '89 - Diag of the Instument Cluster.pdf

top man
cheers
Phil