prototype78 Posted December 15, 2014 Report Share Posted December 15, 2014 Hello, im always see the volt gauge on this cluster to b in the middle of gauge when they are off or disconnected...my question is...what does it mark when its on.. and does it stay in the middle when u turn it off?! Link to comment Share on other sites More sharing options...
ucw458 Posted December 16, 2014 Report Share Posted December 16, 2014 It's an amp gauge not a volt gauge. It's supposed to be in the middle when off. It will be between the middle and the + side when charging the battery or running heavy loads. If it ever goes to the - side when the engine is running and stays there you know the alternator isn't working and the battery is discharging. Link to comment Share on other sites More sharing options...
prototype78 Posted December 16, 2014 Author Report Share Posted December 16, 2014 Ucw thanks for the reply...now that makes more sense. Link to comment Share on other sites More sharing options...
prototype78 Posted December 17, 2014 Author Report Share Posted December 17, 2014 Sorry I have another question, how I make it work on my 87 ?!...I see on the manual - goes from ignition coil and + from fuse 1... Link to comment Share on other sites More sharing options...
markhansenconquest Posted December 17, 2014 Report Share Posted December 17, 2014 u cant.. u need a 87 - 89....86 is wired different........ Link to comment Share on other sites More sharing options...
83stariontravis Posted December 17, 2014 Report Share Posted December 17, 2014 So you're working on putting it in your 87. I assume it's a digi cluster. Hit me up if you wanna know how to get it to display over 85mph. Link to comment Share on other sites More sharing options...
prototype78 Posted December 17, 2014 Author Report Share Posted December 17, 2014 I have semi digital and thats the only gauge its not working and I want to make it work Link to comment Share on other sites More sharing options...
ucw458 Posted December 18, 2014 Report Share Posted December 18, 2014 Just wire it up the way the FSM says it's wired in the older cars and it will work. Link to comment Share on other sites More sharing options...
prototype78 Posted December 18, 2014 Author Report Share Posted December 18, 2014 K ill try and tell the result tomorrow with an xtra cluster I have Link to comment Share on other sites More sharing options...
ZacMan Posted December 28, 2014 Report Share Posted December 28, 2014 It would be tricky to get an amp gauge working in a car that wasn't originally fitted with one. StarQuests that came with the amp gauge have a really long main power wire within the fusible link box. Most of this wire is coiled up inside the bottom of the box, beneath the relays. The Amp gauge is connected to either end of this (via a 5A fuse), and acts as a shunt around the main power wire. The gauge only takes a small fraction of the charging (or discharging) current, as most of is passes through the big coiled wire. They typically no longer work, due to corroded connections at the fuse (next to the high beam indicator fuse) or the screw connections to the flexible circuit board on the back of the gauge cluster itself. The FSM will show how the amp gauges are connected, but not the fact that there is a big length of coiled wire involved. It's a s***, wasteful system, is prone to failure, and should be removed. Doing the reverse however, getting a voltage gauge working in place of an amp gauge, shouldn't be too hard. A voltage gauge will be more reliable, and tell you almost the same amount of information. I'd go that route. Link to comment Share on other sites More sharing options...
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