Right on the Mark
Dedicated LVC Member
Dude you seem like a wiring Guru. Thats a good thing in this swap and the thing I hate. Wiring! Or wire troubleshooting.
You should really really read this thread:
http://www.lincolnvscadillac.com/showthread.php?t=70387
Of course, depends on what your "cooling fan control relay" is - certainly more pins than a plain relay. Looks like there's two CF5-4's.
Dude you seem like a wiring Guru. Thats a good thing in this swap and the thing I hate. Wiring! Or wire troubleshooting.
The gen1 solenoid pack is probably where I would look to take fan signals from, assuming you had a two-speed fan or two fans. One for low, one for high/ac. Seems like a relay and some wiring would give you what you want without reinventing the wheel. Or is that what the connectors are?
Awesome, thanks!
I lucked out and bought a Gen1 S-Type fan with the controller/relay still on it.
No need to build my own.
Negative. It's a ground-controlled PWM signal. You *can* drive a relay from that, as I documented, but it will kill the relay, get stuck on, and can destroy your PCM. To do something like this would require enough circuitry to properly drive the relays that you might as well make a real fan controller. I mean, geeze, I wrote a dissertation on the topic!
Good luck! I hope the Gen 1 S-Type used the same signaling as the Gen 1 LS actuator. Gen 1 LS and Gen 2 LS cooling signals are quite different - PWM is inverted (Gen 1: 100% PWM = 0% Fan, Gen 2: 100% PWM = 100% Fan) and the period is quite different (~10ms vs 7ms), and the signalling is different (Gen 1: ground switched, Gen 2: positive switched). The LS Gen 1 signal is perfect for an actuator, and useless for a fan controller. Vice-versa for the LS Gen 2 signal. The S-Type fan might be expecting a LS Gen 2 signal. You can plug it up and see.. I did lots of testing with the car - it'll hit overheat in about 5 to 10 minutes idling in 70degree weather. Best way is to bribe someone with an S-Type and a scope to probe the line.
Anyway, please post your results in my thread for reference! That would have been much easier than making the adapter.
At least one delta is the LS doesn't have a separate feed for the A/C signal - the PCM input changes (adds ~40% to/from the period as appropriate) when the compressor is engaged. I'm curious why the Jag has that separate line. Would be great to see some traces from the Jag PCM!
Sorry, by trace I meant oscilloscope trace of the signal on that CF5-5 pin.
With the PCM signal increasing with A/C, you might get a double-increase with also using the compressor clutch tap. This would be fun to play with. If I didn't have another gen 2 fan for my other project, I'd give this one a try. They're less common, but seem to sell for less than the LS fans.
These are my options:
1. Build a signal generator to reverse the PCM signal.
2. Purchase a Flex-A-Lite fan controller and ditch the, non-integrated, S Type controller completely.
3. Pay Oddball to build me a signal generator/converter for my S-Type cooling fan.
Oh, what to do? What to do?
have you tried those wheels on yet?
Are you planning to dress up the engine after everything works??
Please paint those valve covers ford blue.
Wow, quite a bit of room all the way around. Guess fitment isn't an issue. Does the hood close with the elbow on the manifold?