Sensors different for different dash clusters?

Sensors different for different dash clusters?
My 1988 Cherokee had the bare bones dash cluster and I replaced it with the full dial cluster version, now the oil pressure gauge is going crazy (Maxing out) and the temp gauge never climbs. I called the shop and they say "There are two different sending units depending on what cluster you are using". This sound’s logical is there any truth to this claim?

Thanks.

Usually the "senders" for the idiot light setup are simply switches: when the pressure, tempurature or voltage drop below or exceed a preset value, the sender/switch closes completing the circuit to the appropriate dash light which then illuminates. With a gauge setup, you typically need sending units that operate as variable resistors; as the resistance of the sender varies (with increase/decrease in pressure, tempurature or voltage) the voltage through the gauge varies and is displayed via needle movement. I am converting an '85 S10 from a factory basic setup to a full gauge setup. In addition to the sending units, I found I need to rearrange the pin contact setup for the main dash connector plug..... whether this is needed for your Jeep conversion I don't know.


mike

Well you (and the shop) were right, after replacing the sending units with the gauge versions (and they are different looking) everything synced up great.
Fortunately the plug-in in the back was the same configuration, so no problems there.


Thanks for the reply.