Temperature Sending Unit

[bstaples]

I had to replace my Temp Sending Unit with a mechanical gauge but when I unhook the sending unit the truck runs rough and the service engine light comes on. So it's hooked up just setting there. My question is can I unhook the sending unit and splice the wire together to make it think its still there or will that cause more of an issue than just leaving it hooked up laying on the intake. Any help would be greatly appreciated .


Thanks