Not having a dig at you but the way you wrote it suggested you could just swap over wiring and be done with it
As you have probarbly seen, i dont always explain exactly what i mean, and have to sometimes re write stuff, like when i said that i want to wire up an external temp gauge, it looked like i want to wire it up to the water temp gauge!!
you got any pics of transferring the control circuitry over?? from what you describe youve in essence f_cked off the mondeo circuit and just use the puma circuitry and control IC to power the motors for the mondeo dials. Have you been on a drive to make sure the revs and speed read correctly proportionately?
Thats exactly what ive done, still used the circuitry on he Mondeo clock, but basically followed the circuitry from pin 18, 21, 24, and 25 on the puma clocks, looked at how it was laid out, and replicated it on the mondeo clocks. Theyre just a few chips (which are present in the mondeo clocks) and a few resistors. Then Pin 1 & 2 on the mondeo clock are power (same as Puma), Oil light (pin 8 ), Air bag (pin 9), ABS (pin 10), Handbrake (pin 11), left indicator (pin 18), Right indicator (pin 19), full beam (pin 20), door open (pin 23). It wasnt without fault, i burnt out some of the cuircuit board on the back a few times, and had to re solder chips and bypass burnt out cuircuitry. Ill get some pics when i get my blue dials through.
You thought how to get the LCD on the rev counter to work? or are you thinking of transferring the temp module into it?
it would be interesting to know if theyve used the same motor arrangement and how each motor determines its angle, ie is it the motor circuit that is calibrated to move the dial 10 degrees per 10mph or if the circuit converts a speed into a direct angle for the motor. You want to make sure there is no mismatch between the two. if it works perfectly then you could in theory put a dial face and motor unit from say a 170mph speedo in it.
Im going to try and do the same thing with the mondeo temp clock, surely it just needs 12v power, and the converter chip that converts the signal from the temp sensor. Ive taken out most the chips from the mondeo clock as they were earthing things that didnt need to be earthed ect, so theres plenty of places to put it!
Ive still not got the Air bag light wired up properly yet, but it looks like everything else is working. I thought the same thing with the motors, because when i first wired it up they werent all working well, so i also swapped the actual motor over too, they are exactly the same dimensionally, so just 2 t10 screws and straight swap. I think the motors are the same, but with no part number on them, i just took the precaution of swapping them. Ive not tested it all properly yet, or driven it, so dont know if the coolant temp or speedo are working. Ive checked the angles of each clock, and the increments are exactly the same on all dials, so with the same motors and the same signal from the ecu, they should function correctly!
I looked at the RS and ST170 clocks, but looking at the ST170 clocks, they look front lit like the puma clocks, and thats what i was trying to get away from, so my preferance is RS clocks.
Fitting wise, they are a fair bit wider, so you can just about see the edges of the coolant and fuel gauges, so im going to heat up the widest points of the surround, & elongate them a little. The screws are on the bottom of the Mondeo clock, and it wont fit the fixing lugs, so ive had to cut them off, and ill look at an alternative method of fixing them.
A quick not to anyone else who wants to do this. The Mondeo clock uses the same earth for pretty much everything, the puma clocks dont, so if you dont seperate them (cut through the surface mounted conductor), you will burn it out in the as soon as you plug it in, as i learned yesterday!! I came close to giving up a few times, as there is so much to try and isolate, when i disconnected the fuel light, the odometer worked, but could not get them to work at the same time, sooooooo frustrating! I had to de solder almost all the lights, and start again wire by wire to find out where it was shorting, and isolate each individual bulb when there was a problem.
As said above, these are now basically puma clocks on a mondeo casing!
