Anyone have detailed instructions, preferably with pictures, for wiring up the meziere HD. I heard something about wiring it to the fan off a relay.I want to make sure it goeson when needed and the engine won't overheat... I've spent way too much $$$ this winter on the engine to have to replace a new one...

 

Check tech tips on this. Strick wrote a good one that covers this.

 

I'll save you some time, Here is a passage from that long article:

All that is left is the wiring. Meziere didn't give us what was really needed to wire this pump up correctly. So, you need at least a 30 amp relay (Radio shack has one, but a good electric fuel pump 30 amp relay might be better as far as lasting longer). Another product that might be better is the Painless brand electric water pump relay kit from Jeg's. I just didn't know the amperage of the relay and it was $30. Also, I bought a 10-gauge wire 20 amp fuse holder with a few feet of 10-gauge wire. Some 10 - 12gauge terminal ends, Insulated female receptacles to plug into the relay, butt connectors to connect to the fuse holder and I eliminated the Mez plug connector and went with butt connectors. A better way would be to use a quality weather pack plug. Also, get some ring end terminals to connect to the "jump-start junction block." In case you don't know what a relay is for let me explain. The relay is a switch that keeps the high drawing amperage components away from areas that shouldn't have high amperage. The relay has a signal circuit that energizes the relay and makes a high amp connection. The Mez pump is a high amperage draw and we need a relay to turn it on. Where does the signal circuit get its power or signal? I chose to use the "run-on, bulb test, crank" circuit which is the one that is powered when the ignition switch is on. Where did I get the power to run the pump? From the "jump-start junction block, which is basically a direct shot from the battery. Okay, enough of electrics 101. There is a block or junction of electrical wires connecting to one source (a bolt with a nut) right behind the battery. This is 12 volt all the time power. Put a ringed end terminal on it and run the wire to the relay you bought. One of the tabs should say 12volt in. I mounted the fuse holder on top of the ASR with the bolt that holds the cover on. I also mounted the relay just under the ECM, there is a small plastic tab that sticks down and I drilled a small hole for mounting the relay. Continue the wire from the relay where it says 12volt out to the fuse holder. Connect the other end of the fuse holder to the BLUE wire of the Mez pump. I dressed it into the harness right along the edge of the fender. I used a butt connector instead of the supplied plug (too cheap). Run the black wire from the pump to a ground, I used the ground bolt just under the fan relays. Secure that wire from the pump to the fan braces via tie wraps; don't want to have it tangle with the serp belt. Now for the signal circuit. In my 92, the run-on circuit runs to the fans and it is pink with a black stripe. You can find it by tracing back from the cooling fan relays to a point where you can make a splice. If you have any pink wire at the store, you can keep the color correct for your circuit, or just use any 14 -16 gauge wire. After making the splice, run the wire to the relay and connect to the "on/off switch" tab. Run the remaining tab to ground. Again, I ran it to the same bolt under the fans for ground. Recheck your connections and that is it for the wiring. DON"T TEST IT YET UNLESS YOU HAVE REFILLED THE COOLING SYSTEM. The instructions say don't run dry. If you followed the wiring exactly, your pump will turn in the correct direction. Blue gets the power and black goes to ground. Did you reconnect the battery? Refill the oil and cooling systems. I don't use DEXCOOL; I just use the GREEN STUFF and distilled water.

 

You da' man, Tom!