Pls have a look at the attached pics and see if you can figure where they should go? Hopefully the pics are clear enough.

 

One wire green the other wrapped in black tape and has a fuse wedged into it.

Anybody recognize? it's a 455 if that helps.

 

That connector is normally mounted to a sensor on the passenger side of the T-stat outlet. I believe it's called a TCS switch?? Someone will chime in with the correct name I'm sure. Most people remove them when going to an aftermarket intake. It is not necessary & should cause no issues with your car. That's not a fuse, I think it's a diode?

 

A picture where we could actually see the part in question would be helpful.

Starting in either '71 or '72 there is an A/C pressure safety connection that has a fuse in it as well.

- Eric

 

Eric, if you click on the pic then do a right click and 'save image as' on your computer, you'll then be able to open it up and zoom in to see the wires. I think that diode is probably a more correct term for what we can see.

Thx,

Richard

 

I'll guess that the diode equipped 2-banger went on the TCS [Trans Controlled Spark] thermal/ electrical/ vacuum switch... which is not present. A solenoid commonly has a diode across the line to allow the energy in the coil a path to dissipate when power is removed- otherwise it can create a voltage spike fed into the car's wiring. [Not sure why the Big ***** solenoid on the starter does NOT need one...]

The single wire no doubt goes [or used to go] to the water temp sender which has no wire on it. It looks like the type that fits "sideways" onto that post on the sender, not in line with the axis of the sender. Probably a w/ vs. w/o gauges thing - I see you have a gauge type sender for oil pressure.

This is just one of many reasons everyone should have their own copy of the Chassis Service Manual.... "What is this? What did it used to do? Can I do w/o it now? How was it supposed to work?" Much is revealed in the CSM.

PS, your PCV grommet is sideways, the flat side is supposed to be the top. It may matter for fitment of the filter assembly.

 

The "diode" on the TCS switch connector is really a 150 Ohm, 5W resistor. Since this solenoid will operate a lot in normal driving, the resistor helps suppress static on AM radios.
Just wrap up this unused connector and tuck it into a safe place.

 

Sorry, the first picture is about 300 pixels, and the last two are about 800x600.
No zooming possible, at least not any that will make the pictures clearer.

Honestly, I couldn't even see what you were talking about in the picture, but now that I've had another look, I can make out the part, and it's a TCS plug, like the others said - the A/C part is much larger and has a fuse, not a resistor.


Thank you .

- Eric

 

answer:

more clearly, since the starter typically operates only once during a driving cycle, and at the very beginning of it, there was no need to shunt the counter-emf/emi someplace(usually to ground). of course, over a long period of time, this "spike" could eventually destroy the contact that controls it(ignition switch "start" contact). you would also need a hefty diode for that mission, and back in the day, they just weren't cheap/small/available enough to justify installing one on every car. the resistor they used in the tcs circuit was far cheaper and more reliable than putting a diode in the circuit.


bill