'87 Is computer necessary for heater to work?

[deesandvees]

Haven't completely dived into this yet but I'll ask the question that will at least get me on the right road. Is the ECM necessary for the heater to work? I switch the switch and nothing happens, no blower motor or hot air. I eliminated my ECM when I put my new motor/trani setup in and had only recently plugged in whatever was involved over there by the heater box. I also eliminated the valve on the heater hose that allows hot air to come into the ventilation system because it had broken vacuum lines on it. Will replace those when I find a good set but they're a pain to get out of a junkyard car. The fuses are good, but will double check them when I go all the way in on this.

On a side note, is the ECM necessary for cruise control to work? I know there's a speed sensor that goes on the back of the speedometer but where the info it gets goes I don't know.

[silicon212]

No.

[mega420]

for all i know the vacume is necissary but if you straight piped it then its not needed. my best thing would be is to hook up the blower to a toggle switch hard wired to the battery with a inline fuse. this way you can shut it off and on i did this in a 196? ford f100 cant remember exact year but was my fathers and it worked pisser used a 3 way toggle so i had low med and high.. just left the heater controls there for look but you can even remove whole console and olate it up put a tv there or what ever.but by the way you have one damn beautiful caprice and rare, can't find a 2 door anywere

[j cAT]

under the dash in the steering shaft area is a wire crimp...the wires should be orange in color this was where 3 wires were joined together..the crimp some how corroded causing no a/c heat blower operations...

check for power to the swiches...follow back..use color to guide you