Speedo correction yellow box help Please

[Zoolander Lurker Find all posts View Profile Close Zoolander]

Hi all,
I've been reading the forum here about the yellow box speedo correctors but I can only find info on the 120 series. Has anyone installed the yellow box speedo corrector or similar on the 150 series? I think the wiring is different. I would really like to correct my speedo but cannot find information on which wire is the speedo wire. can anyone help me.

Thanks.

[stevep84 Find all posts View Profile Close stevep84]

Get a Scangauge. It will give you the actual speed as well a plethora of other readings.

Sent from my GT-I9305T using Tapatalk

[kyleh Junior Member Find all posts View Profile Close kyleh]

My gauge is more accurate with a small step up in tyre size, compared with GPS and road side indications.

[Zoolander Lurker Find all posts View Profile Close Zoolander]

Thanks for the replys, but I really am after the wiring details for this issue. Can anyone shed any light on this for me. I have the yellow box already, but I think I have incorrect harness information as removing the suspected speed input wire to the combination meter has not changed a thing.