Somebody can Help Me?, I got a S10 Blazer 92 with a digital cluster burned and i found a 88 one with tach in a junkyard, and im tryin to make the swap but the temp. gauge always go down, when i start the car can see the needle going a little bit down and when i use the turns i can see the needle of the batery moving a little bit if is right turn go a little up and if is left go a little down, the fuel gauge is always on top... somebody know what can i do? or some method to wire becouse im doing something wrong...

i use the diagram of this page for the wiring of my car http://people.oregonstate.edu/~akeym/
and use this pins for the 88 cluster:
'88
1 (D) Fuel
2 (D) Oil
3 (+) Oil, Volt, Temp
4 (D) Temp
5 (+) Right Turn
6 (+) High Beam
7 (-) Battery
8 (-) EBrake
9 (-) Check Gauges
10 (-) Upshift
11 (-) Service Engine Soon
12 (+) Idiot Lights: Battery, Ebrake, Check Gauges, Upshift, Service Engine Soon
13 Not Used
14 (+) Gauge Lights
15 (+) Seat Belt
16 (-) Fuel, Oil, Volt, Temp, Idiot Lights: Right Turn, High Beam, Seat Belt, Left Turn
17 (+) Left Turn
18 (+) Fuel