Looks like my blower module has failed - it runs with the key out of the ignition. 1988 with C68 Climate Control.

I've been thinking about the module - I reckon it's just a speed controller, the same as we have on model planes - and used to be able to build for model railways and power drills etc - because you can't send low voltage to a motor to make it go slow, because it burns them out, so the current has to be sent in pulses.

It probably has more circuitry than just speed control, but I have two 25 amp plane speed controls, they are very small- a 35 amp is hardly any bigger. But that's the advance in technology. I'm wondering if a newer module would give me better blower speeds?

I'm going to replace it, but hope someone here knows how they work and can give me some advice - there's been a huge improvement in technology in this area, since my vette was built.

I was also told that it is an amplifier - does that mean it can send more than the battery voltage to the blower on full? like in inverter? because the new blower I fitted last year, runs the same speed as the old one, and that's about half the speed I need.

I'm hoping some expert here can tell me how the module works and also advise whether there is a better replacement - I don't care if it doesn't fit the hole or have the right plug socket, but I'd really like to get that blower going faster

Any electronics Guru's out there?

S'nut