No Electrical at all. Engine starts and runs

[DAC21]

I used this one. Looks exactly like my original and the same as what is shown on vendor sites. Threads were correct as well. Works like a champ.

https://www.rockauto.com/en/catalog/for ... itch,10474

Nice I hadn't seen that P/N pop up before, I only knew about the SLS-178 from a posting from 12 years ago from 23yrRebuild. The two P/N look identical, but maybe some internal differences? Did you buy the cheapest "T" model?

viewtopic.php?t=11873&start=15

[devo]

I used this one. Looks exactly like my original and the same as what is shown on vendor sites. Threads were correct as well. Works like a champ.

https://www.rockauto.com/en/catalog/for ... itch,10474

Nice I hadn't seen that P/N pop up before, I only knew about the SLS-178 from a posting from 12 years ago from 23yrRebuild. The two P/N look identical, but maybe some internal differences? Did you buy the cheapest "T" model?

viewtopic.php?t=11873&start=15

I Think I bought the more expensive one at only $2 more. I recognized the part as a Ford part from having had a lot of old Fords. In comparing, It was identical to the original Datsun part on my '66.

[ppeters914]

That's a good price. They rarely go bad. Changing to 67.5 brake switch is a lot of work and not worth it.

Any way to test the switch by itself?

[redroadster]

That's a good price. They rarely go bad. Changing to 67.5 brake switch is a lot of work and not worth it.

Any way to test the switch by itself?

See the fifth post here

[ppeters914]

That's a good price. They rarely go bad. Changing to 67.5 brake switch is a lot of work and not worth it.

Any way to test the switch by itself?

See the fifth post here

Sorry. I meant test the switch on the bench. I have a bare, rolling shell that is just now going together; no hydraulics, no wiring, no nada.

[DAC21]

Any way to test the switch by itself?

See the fifth post here

Sorry. I meant test the switch on the bench. I have a bare, rolling shell that is just now going together; no hydraulics, no wiring, no nada.

At this price ($4.34) maybe not worth the time. At the stage you are at you will sending a lot of Sheckles to Roackauto. So start a list. I have a 1967 and can send you along a list of parts like hoses I found there.

https://www.rockauto.com/en/moreinfo.ph ... 0474&jsn=8

[redroadster]

Ohms test , all you need is the mutimeter and a way to get to the swt. Wiring hook a POS wire into the swt. ( With a circuit breaker online) see if it pulls current
And check volts , a way I liked to check something like this, was hook a tiny buzzer in to the system then move wiring and connector's, if it buzzes that's likely the problem ...most electric problems at the dealer are handled by the 20-30 yr old guys that can contort to access the under dash area ....got a teen around ?

[ppeters914]

Ohms test , all you need is the mutimeter and a way to get to the swt. Wiring hook a POS wire into the swt. ( With a circuit breaker online) see if it pulls current
And check volts , a way I liked to check something like this, was hook a tiny buzzer in to the system then move wiring and connector's, if it buzzes that's likely the problem ...most electric problems at the dealer are handled by the 20-30 yr old guys that can contort to access the under dash area ....got a teen around ?

This is what I'm looking at:
....

brake switch.jpg

....
I'm retired IT, understand basic electricity and troubleshooting, wired a house, and rewired several Harleys. I'm guessing that swt means switch and POS means Positive, but, I'm sorry, I don't understand what you're suggesting.

[Curtis]

You have to apply pressure to the switch for the contact to close. I use an adapter with a regulator to set air pressure.

[redroadster]

Ok that's good you are skilled in electrical work , I thought otherwise , I guess
Seems to me you need to be specific in how and what you tested and the results for us to fully understand
Did you test the neg side at the tail lite bulb ,that takes away the 1st half of the system then it's just tracing bake

[ppeters914]

Ok that's good you are skilled in electrical work , I thought otherwise , I guess
Seems to me you need to be specific in how and what you tested and the results for us to fully understand
Did you test the neg side at the tail lite bulb ,that takes away the 1st half of the system then it's just tracing bake

There's the problem. You're confusing me (ppeters914) with the OP (MichaelClay). I don't know what Michael's knowledge or skill level is regarding electrical stuff.

[redroadster]

What Tests Have you completed ? In detail & where did you start ? It kinda sounds like your goofing about this .
I get it the flat dash type are hard or to pull the dash to access , but you could narrow down easier to work on parts of the system
BTW , I've been to Datsun , Nissan Mitsubishi, Kia ,
Volvo, Jeep/ Eagle &Toyota electrical school 3-4 day sessions
Votec also

[Curtis]

Simple solution for brake switch, buy new switch, through away or box old switch and ignore all our posts.As to the other stuff, we'll do what we can.

[MichaelClay]

Stupid question. The brake switch is basically fused to the proportioning valve? I’m soaking it in wd40 and I’m going to get a socked to fit it. I’m afraid I may pull the whole assembly off the car and/or break something. Any ideas? I don’t think it would be a good idea to get a torch in that area to heat it up.

[Curtis]

Use something to hold the line manifold so it will not twist. Lots of people will have a spare one laying around.