A little wiring help needed

[me52dph]

So I am about finished with redoing my wiring harness. I am to the point of wiring the ignition switch. Pretty sure the switch isn't original. Has 4 posts on the back. ACC, Bat, IGN. These are the 3 outer posts. The center post says ST. Now the questions.

1...ACC Does this go to the positive side of the ammeter? Also the fuel gauge? And the end terminal of the headlight switch?

2...IGN Does this go to the coil?

3...BAT I assume to the positive side of the battery?

4...ST No idea what this is.

Last question...the starter had a positive and neg. going to the battery off of the same post. Is this correct?

Sorry if these sound like stupid questions. Just don't wanna ruin the work I've already done. Thanks for the help.

[Plymouthy Adams]

acc is accessories...provides power to such accessories that are swithed..this is hot in on position and also if switched let to the acc psotion...allow accessories to be fed while NOT powering the ignition scircuits

 

Ign is for the ignition system...

 

batt is battery in

 

ST should be the lead for the starter solenoid to engerized it

 

your starter should not have pos and neg bables same terminal connected back tot he battery this will be a dead short..possible boom boom time for the battery..

 

follow your wiring schematic for your model 

Edited May 18, 2015 by Plymouthy Adams

[JBNeal]

here's a wiring diagram that might help...it has an optional headlight relay circuit, among other things

[me52dph]

here's a wiring diagram that might help...it has an optional headlight relay circuit, among other things

[me52dph]

Haven't seen that one yet. Looks like it might help.

[Brent B3B]

recycling the title hope you don't mind me52dph

 

anyone have a wiring diagram for a micro brake switch? i have a "signal stat 800", wondering if the switch should run off the ignition or the "signal stat" and where does the other side of the micro brake switch itself supposed to go? 

i am not trusting any previous wiring on this truck .... after all, the main brake switch was powered by the voltage regulator

[TrampSteer]

a "signal stat 800"

 

 

 

I varied from something I found on TruckLite for a series 900 if that helps.

[William Davey]

Brent - are you trying to replace the hydraulic (master cylinder mounted) brake light switch with a mechanical switch?  If so, I recommend you try this.  http://www.watsons-streetworks.com/switches/specialty-switches/the-best-brake-switch

 

It's easily mounted and the arm is adjustable to line up with the brake pedal (obviously below the floor boards).  Simple to wire, just transfer (extend) the 2 wires on your current hydraulic switch to the new one.

[Merle Coggins]

The brake light switch should be getting power from the battery directly, (via the ammeter)  just like the headlights. Normally the brake light circuit would get power from the output of the headlight switch's fuse/circuit breaker. The output of the brake light switch will then pass through your turn signal switch. When the switch is in it's neutral position the it will connect the brake light circuit to the rear lamps. When you move the switch to left or right turn it will connect that one side to the flasher and leave the other side connected to the brake switch.

 

At least that's how a Signal Stat 900, and similar switches, work.

 

Merle

[Brent B3B]

Thanks Mike, that link comes up an error for me but i'll will look it up when I use the 900 I got from Mark

Brent - are you trying to replace the hydraulic (master cylinder mounted) brake light switch with a mechanical switch?  If so, I recommend you try this.  http://www.watsons-streetworks.com/switches/specialty-switches/the-best-brake-switch

 

It's easily mounted and the arm is adjustable to line up with the brake pedal (obviously below the floor boards).  Simple to wire, just transfer (extend) the 2 wires on your current hydraulic switch to the new one.

interesting, didn't know they made such a replacement. no not trying to replace this switch is in addition.

The brake light switch should be getting power from the battery directly, (via the ammeter)  just like the headlights. Normally the brake light circuit would get power from the output of the headlight switch's fuse/circuit breaker. The output of the brake light switch will then pass through your turn signal switch. When the switch is in it's neutral position the it will connect the brake light circuit to the rear lamps. When you move the switch to left or right turn it will connect that one side to the flasher and leave the other side connected to the brake switch.

 

At least that's how a Signal Stat 900, and similar switches, work.

 

Merle

thanks Merle for spelling it out for me. that makes sense. I was wondering why the book shows two wires going to the rear and JBNeal diagram has three. 

 

the switch I am referring to is in the B3 manual

after Merle spelling it out, it would make sense this switch isn't hooked up to the "signal stat" but to the ignition. It appears I was over thinking it and confusing myself from to many diagrams.

Now i'll need to try and figure out if the gauge of wire (I think it's 16ga) is appropriate for the distance (draw) and the switch  

 

Thanks for the help guys!

 

 

[Dodgeb4ya]

That's an accessory hydraulic brake switch. Commonly used in door to door delivery like on route vans back in the day.

It is used only to lock up the brakes for short periods of time .. say 10 minutes.

Leave the brakes locked up too long and with a slow hydraulic leak the vehicle could roll away.

So... I would wire it to the run side of the IGN switch.

Also That way if you forgot to turn it off it won't run the battery dead.

I have one on one of my trucks and used it a lot.

[Brent B3B]

Thanks Bob! I was trying like crazy not to bug you again.... :^)