Region: NWR / Oregon
Car #: 88
Year : 95 Posts: 2000
My rule of thumb (prior to labling things that don't plug in any more) is see how far it reaches) and what plugs are in the area.
That's underneath the intake manifold, the wire doesn't look very long, and it has a bigger plug than the AC which is pretty small. Looks like the oil pressure sender to me. Off the top of my head I think the starter has a screw on ring post and a spade terminal also. (I have too many parts still on my car to check the colors or I'd go look.)
-------------------- Keith Novak (Will work for tires)
Black wire with red strip? That's the positive lead for the battery.
"Nothing can be simple. Everything's got to be a pain in the ass." - C. Adams
Loose Member '09 & '10 Great Lakes Regional Points Champion
Region: Cincinnati Great Lakes
Car #: 60
Year : 1990 Posts: 1487
Juan: From memory the wires in that area are for: The O2 sensor, the coil pack, the temp sensor on the back of the block, the starter relay, the oil pressure sender and the injectors. I don't recall any AC connectors back there. A picture might help. Rick
-------------------- Fortune Cookie Racing SM 60 Directions for use: Race, Rumple, Repair ... Repeat!
Region: Central Florida
Car #: 3
Year : 1992 Posts: 1304
According to the wiring diagram it could be the blower motor relay from the starter or the cooling fan relay, the refrigerant pressure switch to the a/c clutch, or the ignition switch starter interlock. Can't find anything else that has a blk/red wire.
Car #: 72 and ?
Year : 90 and 90 Posts: 1051
That is the wire for the water temp gauge sender. The terminal looks like it broke off from the sensor and stayed attached to the connector. In you pix, you can see the rubber plug that sticks out of the head, the sensor is near that plug.
Remeber, you have 3 water temp sensors.
For ECU is on the back of the head and is green square for 1.6 and gray oblong for 1.8
For fan on 1.6 at thermostat housing
For temp gauge, back of head, passenger side for 1.6, drivers side for 1.8
-------------------- Advanced Autosports, The Midwests leader in Spec Miata Service, Parts and Rentals 608-313-1230 Authorised Spec Miata service center www.advanced-autosports.com
Region: SF Nor Cal
Car #: #39
Year : 1990 Posts: 457
quote:Originally posted by Shop Teacher: Coolant temp sender wire
It plugs in the back of the head. Its the temp sending wire. There is a small male conector under what looks like a T Stat on the back of the head. Its kinda low and plugs in from the passanger side. Never trust Mazda wiring diag. they are offten wrong.
-------------------- Al Angulo Auto Instructor Ford Senior Master Tech ASE Master Tech