Full gauge cluster hybrid

[OldSch88L]

Just got done testing and everything finally works. This is for those who want a full cluster with electronic speedo in a Renix era Jeep, but also want a properly working gas gauge without sourcing a later model MJ fuel sender. As we know, a late cluster with a Renix fuel sender reads improperly, and backwards. I won't cover the electronic speedo convertion as info is easy to find, consisting of 3 wires; power, ground and signal. So you need to harvest the fuel gauge and its PCB from a Renix full cluster. The late cluster housing is shallower, so you need to cut off the brass tabs from the Renix gauge. Those are also contacts, so solder some wires in their place.

 

The PCB is held in the Renix cluster with these 4 side-by-side screws:

 

 

By taking out the late cluster's tach, you'll see these ribs, which it turns out are perfect to locate the Renix PCB in the right spot. Mark and drill the holes. I've put in some 2-sided tape to make sure the screws don't touch any tracers on the flexible circuit board. Also, remember the brass tabs we replaced with wires? Well, we now have some unused screw holes in the late cluster that we can use to route them to their contacts.

 

 

You can use the last pic for wiring reference. Also, I suggest small eyelets on your wires to make your life easier. There you go, have fun!

[howeitsdone]

Bookmarking this for future use.