What would make my fuel /heat/ rpm guage work but my speedo not i pulled every fuse i have and there all good its a 99 civic si.

 

you can try unpluging the sensor for the speedo on the back of the tranny and spray it with electrical cleaner thats what i did and it worked

 

Bad speedometer cable maybe? That one happend to me. Or it isn't plugged in all the way?

 

there is no cable

 

touche good salesman

Do any Honda's have speedo cables?

 

nope its all electrical ill try to spray it out see whats up

 

go to radio shack and get some rhiostats (spelling?) plug them in to the pigtail that connects to the sending unit, sweep the rhiostats, if the gauge sweeps then the sending unit is the problem, if the gauge doesn't sweep then the problem is in the wiring to the cluster, the wiring at the cluster, or the gauge itself.

 

Yes.

 

how is a rheostat gonna supply a series of PULSES to the ECU and Speedo?

 

wait you mean that salesman on ebay lied to me? i mean wait... its mad jdm thats why it will work.. lol.