I recently bought a 72 RX3. Previous owner did a hack job to the wiring and I am trying to put back together. Anyone know where this get connected too. It on the driver side engine harness before the ignition coils. I can't seem to figure it out....I have the full schematic but I am not really good at wiring yet. Any help will be greatly appreciate.

 

just get a 30 or 40 amp relay and connect it as follows:

Ignition Relay
30=12V source (battery or alternator)
85=ground
86=12v when the key is on (use a test light to determine is which is which from that harness)
87 and 87A = each terminal can be connected to leading and trailing coils + terminal.



HOWEVER,



You need another set of 30/40 amp relay as a "start relay" for the coils to have 12V when the key is on "START" position; otherwise, it will crank but it wont start. As the result, many have installed a toggle switch to control the ignition relay above as a short cut. let me know lol

 

That could be for the buzzer every one gets rid of . Illl try to find the harness diagram ( what year, and what colors ?)

 

The car start.... Coils get power.. I just don't know what the hell that dam plug is for. There also one on the other side. 1972 RX3 Color is White.

 

stop exaggerating bro...if it runs, then the wires aint "hacked"

A RX-3 has 2 engine harnesses that run from the DS (smog crap and some ****) and PS (alternator, starter, water temp and reverse lights to name a few). It is common to remove them. In fact, instead of chopping the wires, I've removed them off my RX-3 and I've ran my new wires. The original engine harnesses are stored in a box, keeping them in tact in case that the future owner of my RX-3s decide to restore these cars back into 100% stock condition.

 

Well, Mel here a picture of the hacking.... Plus I havent even told about how the wiring under the dash... Looks like Edward scissors hand got a hold of my car... The way I started was... I found the main... Ran my own cable from their to the battery, ran a cable from starter to battery, ran another cable to the ignition coils...

 

in my desciptions i'm giving you the color of the wire first then the color of the stripe.
and its what i found in the wiring diagram. its printed super small but i tried my best.

Yellow and green = negative connection to the leading coil, its for you rev.
Green and white = horn relay
Green and yellow = horn
yellow and white = water thermo unit
yellow and red = oil pressure switch
yellow and black = ign coil relay
Red and yellow = driverside head lights
Black and Red Magnetic valve ??????

the only wires that i'm using are the headlight ones and the rev.
i have aftermaket gauges for the oil and water.
my car is all cut up too. chasing one wire at a time.

hope that helps. PM me your # if you want to talk about it futher.

 

I suggest "soldering" the wires and heat shrink. only **** like "butt connectors" lol

 

well most of that is for the old school emissions stuff...im currently doing a wire tuck. i have only 3 pins left on that connector. ill let you kno tomorrow what they are.

 

Hey! Some off us **** don't have soldering guns at the moment!

 

soldering iron is only $3.99 at harbor freight lol

 

well i dropped the ball on this one.....and you pretty much need none of those wires =)

 

Ok... Thanks