SOHC TO DOHC SWAP AND CLUSTER ISN'T WORKING?

[explictness]

OK so here is the deal.

I did a Sohc to Dohc swap on my 89 Coupe. Got everything running, just that the gauge cluster isn't working. What could be the problem? Harnesses and everything are in and nothing is loose.

Any Ideas what could be the problem?

[Zee]

You have to upgrade to a DOHC cluster from a 91-93 240

[lbrowne]

I thought just the tach wouldn't work - you'd have to get the tach from a 91+ and swap just that gauge , other than that it should work.

[Tx-Sx-FS]

doing same swap at the moment..plz someone with experience learn us..

[180fan]

harness problem if everything's not working. if it were just the tach/speed, then it'd be with the wiring at the lower harness/sensor.

[explictness]

At this moment nothing on the gauge is working. Except for the clock and lighting, and all little red lights for the door, oil. etc.

None of the gauges are working, speedometer, temp, tach, etc.

We already changed out the lower harness twice. the Dohc and sohc, still doesn't work.

What i'm thinking my best bet would be to change out the whole cluster itself?

91+ since those are the years that the dohc came out i'm assuming right?

If so i'll have to go get one.

Thanks guys

[Tx-Sx-FS]

is the harness swap that ppl discuss...is it just splicin the wires to the connector at the ecu?? or behind the gauge where they plug into the gauges?? plz help, last swap issue...that and whats the manual dohc ecu number?? and should i use the sohc or dohc maf for t25 370cc setup @ 7psi but future plan for 14psi?? thanks.

[explictness]

no thread jacking.

is the harness swap that ppl discuss...is it just splicin the wires to the connector at the ecu?? or behind the gauge where they plug into the gauges?? plz help, last swap issue...that and whats the manual dohc ecu number?? and should i use the sohc or dohc maf for t25 370cc setup @ 7psi but future plan for 14psi?? thanks.

hey man no thread jacking.

[smocan]

i dont know your exact problem, but my sohc cluster works fine on the dohc... seems like theres something wrong with the wiring before the cluster... thats a big headache. good luck

[tiger]

I am using a sohc cluster on my 91 dohc... speedo, fuel, water temp work fine .. no tach.. and the weird thing is that when I put my foot on the brake pedal my cluster lights light up now and when my headlights are on my brake lights are on constantly.. could this be that I didn't use the sohc subharness?