If there is not resistance, that means there is a break in a wire somewhere as all connections and wires have some resistance. So, when none shows up it usually reads infinate resistance but your multi tester is doing the same thing more than likely. If it came with instructions check on, "Continuity test". Because zero resistance is impossible unless it is an open switch as every electrical component has some. You might try setting your multi-metter on most sensitive Ohm setting. It is probably correct though and you have a failure in the speedometer.
I am including a diagram of wiring for instruments to see if there is any possible zero resitance situation.
They are labeled; 1of2 and 2of2. If you put 1of 2 on left and the other on right you can line them up for full diagram. Note that GAUGE fuse in diagram 1 splits off for D2 function and Ground G200 in bottom right hand corner is important to check. In diagram 2 there is a switch called the"Locking Check Switch" near G200 in bottom right of diagram. It could be a source of failure. Just line the 2 up and note designations, such as D2 for the instruments, and you have to find them on the diagram to trace them. Other wires will line up when you put the 2 halves together.
Images (Click to enlarge)
Thursday, March 15th, 2012 AT 5:02 PM