Can anybody help me with the wiring for this, please. Theres three terminals on the rear, where do they go!!!

 

if its an analogue gauge i'd guess earth, ignition live, illumination.

 

as above, maybe pick up your radio switched feed as thet wil be fairly accessible as will the illumination live and ground

 

Ive got all the lighting on it working, the three terminals are across the middle. Its a Ford Racing gauge, but i dont want to bugger it up so im up for all suggestions. Well almost!!!

 

whats the colour of the wires?

 

there are no wires on the terminals. Somebody must have an idea, has nobody got one of these gauges so they can check 4 me, please please

 

are they not marked up with , +, - and Ill or somthing along them lines...?

if u think about it u cant actually do any damage by connecting it up wrong as it will either only light the illumination or if teh polarity is wrong, make the volts read negative, at a guess, the outer 2 would be pos and neg, and teh centre one the light pos

 

well its in, lit up but still not wired up. Took it back out on sunday and looked at the rear of it, as said before the three terminals across the back have nothing to do with the lighting as that has a plug at the top. There are 3 terminals, yellow wire to left( looking from the back), two black wires to the center and a red wire to the right, does that help anybody!!!

 

i would have thought yellow=illumination, black =earth, red=live

 

The illumination is already connected via a plug above the three terminals, thats already working

 

If you have an autometer voltmeter first off a hate to disapoint you but do not wire it to the switched wire on the back of the radio harness. I did that in my 96 jetta because yes it is a convinient spot but I was told by a PRO at Autometer that is not a good spot. You will get an incorrect reading. It will stay around 12-13V instead of 13.5-14.3. The resson why is it is getting the current draw from your head unit! Not what is actually running through the system. So with the autometer there are three connections on the back of the guage conviently unmarked One is for a switched power source, one is ground the other stays blank!!!! I think the one on the back left is the blank. I have the manual. Last if you have a bulb hook that up to a dimmer wire along with a ground. You should put the key in and turn to ACC and it should read 12-12.3. Start the car and it should ideally read between 13.5-14.3. Any thing higher or lower... lets just say its a good thing you bought a voltmeter. Get it checked out. Could be a bad cell in your battery or you may need a more powerfull alternater... probably if you have a lot of accesories like me. Especially a multi amped sound system. If you have any questions please AIM me at m4monaco good luck.

 

my one (not autometer) has

illumination wires from head lights

then
live
earth
and a switch live

cant remember the colours though