Is here a diagram showing how a Pass & Seymore 4 way switch is wired internally?

yes and a relay.

Wiring diagram located at
https://www.legrand.us/passandseymour/light-switches/combination/led-lights/692ig.aspx

Hi Ken, Three way switch circuits can be the bane for even experienced electricians. Does the customer's circuit work, without the 4 way switch from the two three way locations? They would have to connect their traveller wires together and leave out the 4 way switch. If the circuit does not work this way, then there is a fault in their wiring of the circuit. This becomes their problem, but you seem to be the type of fellow that wants to help the customer through this as well as get some understanding yourself. I like this. I am also of this type of customer service. So, this is our problem. Now let us say that the circuit is working without the switch. Take the 4 way switch, now, looking at the diagram included, use an ohmmeter set to 200 ohms and put the red lead on the terminal upper left side. Take the black and touch lower left (switch facing up) and see if you have continuity. If not, flip the switch, you should have continuity. Now move the black to the lower right, flip the switch if you have to. It should show continuity with the switch in the opposite direction. Move the black to the upper right, there should be no continuity with either switch position. Move the red lead to the right upper terminal. Perform the test again but on the right side lower and left side lower. You should have continuity depending on the switch position. Now, upper left and there should be no continuity. This will indicate a good switch. Now if the customer's wiring is good, then they need to connect the two traveller wires from their 3 way switch to the upper two terminals on the 4 way. The other two from the other 3 way go on the bottom two terminals. The circuit should work. Remember here please, if the switch tests good, then the fault is in the customer's installation. Now to convince the customer! The key for the customer is this, does the circuit work if he connects his wires as just a 3 way switch circuit without the 4 way. I have 40 years experience as an electrician and if I was called in to troubleshoot this circuit, this is what I would do. Once the 3 way is established as good, then the 4 way can be installed. I hope this helps.

Wiring diagram for three-way switches with pilot light-pass-seymour-3-way-wiring-diagram.jpg
JOe

blue/white is amp remote turn on, red is ignition (switched hot pos.), yellow is constant hot, and black is ground (neg.)

If the wires are coming out of the switch portion & not the outlet, 1 goes to power the other goes to that color wire that goes to your light. All you are doing with a switch is cutting one side of your power, putting switch in completes the circuit when it is turned on. Or breaks the circuit when it is turned off. The other wires, power in & back to light get wire nutted together.

Deffinitely but wired directly would be pointless, the Alpine's internal amp is way to weak to get the best out of the sub. You need an amp, minimum 300w and bridge the outputs to give all the power to sub preferably switched to low-pass (most amps will have a high / low pass switch)

http://www.300zx-twinturbo.com/cgi-bin/manual.cgi?list=diag&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=4&design=default&total=4

if first one doesnt work use main page
http://www.300zx-twinturbo.com/cgi-bin/manual.cgi

go here

click circuit diagram and pull up the pages it should be 1-4

what your looking for is on page four in the middle of the diagram to the left of the rear window deffoger switch. good luck bud

FOUND YOU A WEB SITE FOR WIRING DIAGRAM
CARTER & GRUENEWALD CO. INC.
IF THAT DOSN'T WORK LOOK UNDER FARMALL 140 WIRING DIAGRAMS AND THE SITE WILL BE LISTED THIS SITE WON'T LET ME COPY AND PASTE TO YOU

Hello magoocsl,

Yes, with the use of 2 high-pass and 1 low-pass crossovers, that Kicker amp will operate in what they call stereo and mono simultaneously (SAMS). You'd run 4 of the 6X9's in mono. Wire them in series-parallel with a low-pass crossover on the positive leg to the amp. The amp would see a 4ω load. The other two 6X9's would be wired as stereo, one to each channel with a high-pass crossover. Again, the amp sees a 4ω load.

Here's a link to the appropriate wiring diagram. The diagram is on page 5. Just substitute your 4 6X9's wired in series-parallel where they show the "mono" speaker.

http://www.kicker.com/sites/default/files/02KX300_400_500_800_2AmpManual.pdf

Hope this helps.

dont need a diagram,, most amps have a speaker level input...dont mix this up with line level....connect your wires from back of factory speakers to speaker level input on amp...then if your amp has a low pass switch select lowpass setting now you have punch