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I'm curious. What are your reasons for wanting to tamper with/downgrade such a critical system in first place? Especially when you don't appear to know what you're doing? A clean bay isn't a valid reason and hopefully you're not one of those morons who thinks he can out-brake/out-steer ABS so...

Not rocket science. If it came with that engine it's an 87.

It's ok, those Honda parts will shield him :icon_razz

Rtfm helps...

Not me. As you've already pointed out the problem could be quickly resolved with a meter and the schematic but since he's apparently unable to use either the only thing I'm going to save is time. Mine.

Lmao. One of the best things that could happen to this country. edit: Hmmm. How come when I post a .gif it's static?

Not only do they do a visual but in Basic counties they also function test the EGR valve.

Depends on his county. They may not do enhanced. There's still the visual problem though.

Yep, just have to wire the control to switched +12. And doing it this way means you no longer need a second relay.

That Dakota is a new model. The older one (still had the readout) was cheaper if you can find it. "Sonalert" is a Mallory trade name btw. I shouldn't have used it because real Sonalerts aren't cheap. There's plenty of copycat ones out there that are though. And again, if that mechanical...

Yep, should be OK (only need 2 relays if you want the fans off with the key) as long as that stat is good for the current. Just don't skimp on the rest of the wiring and fuse it as close to the battery as possible. I'd still use an alarm. Shouldn't cost more than 10 bux for a Sonalert. Get one...

Yeah, I just took a look at those. Couple of them are good for 45 amps. That'll work. One nice thing about the Dakota is the digital readout.

Yep, until the rpm (and thus the counter-emf) comes up they're really sucking it down. Speaking of counter-emf, some people use the 5 terminal version of the Bosch to short the fan when it's not needed to limit freewheeling. I like those PWM fan controllers. There's something elegant about...

Well, the inrush will be more but the typical 30 amp Bosch should do. You could always use 50s. I think the newest Dakota controller does 70. Course, relays are only one part of the equation. There can't be any weak links anywhere in the install. One thing I dislike about Bosch relays are the QC...

No. Again, how much current does the fan need? Use 30 amp relays minimum. For two fans, bigger. Bosch or equal. For automotive work soldering, if done right, is adequate. I have no illuisons broke kids working on old cars are gonna go out and buy the proper crimp stuff even though with a lttle...

AMP PIDG (PreInsulated Diamond Grip) are good. Common in the aerospace biz. It's pretty much all I use. As far as corrosion a properly done crimp is gas tight. The wiring is subject to corrosion from wicking just like in soldering but using plated wire limits that. The environmental splices Ian...

Sonofabitch, you're right! How did that happen?

Only cuz that funny money you use is worthless ;) jdm: We've been through this before. Crimping, as long as it's done with quality stuff and tooling to match, is superior in every way. Why it's used on aircraft/spacecraft

Well, it's cheaper. That's the only thing you got right.

You already have an alarm switch built in: water switch #2. Connect something like a piezo alarm to it behind the glove box where it comes in through the firewall enroute to the AC amplifier. For fan control I'd use something like Dakota Digital or Spal. If you decide to stick with that thing...