Sign in to follow this  
Followers 0
Quinn'Z

S30 battery boiling over, need reg jumper

16 posts in this topic

Just installed an internally reg alternator And I need to know how to by pass the old regulator. I will buy the"Dave guy"clip fix but I can't wait till it gets here a i'm stuck on the island and I start my nee job Monday. Any help would be really great. It's a rectangle, 5 wire connector. BW, W, WB, Y,B, GOING INTO regulator. Please please help. I'll literally be unemployed and homeless in a week if I done get this solved quick. Thanks

Share this post


Link to post
Share on other sites

Thanks guys. Going to the page now.

Share this post


Link to post
Share on other sites

Just have the grwnd and possitive wire on, disconect everything else from the alt.

Share this post


Link to post
Share on other sites

So simple when you knew which wires need to go where. going to buy a good volt meter now too. Thanks again!

Share this post


Link to post
Share on other sites
Just have the grwnd and possitive wire on, disconect everything else from the alt.

That would be good for a short distance until the battery goes dead.

Share this post


Link to post
Share on other sites

I'm still not Having any luck. When I hook up power to the S terminal the alt squeals a bit and my idle reduces, when I hook the white and yellow wires together nothing happens. Yesterday I connected the K to the battery and the wire started to melt. I guess the original wiring is done. Anyway to run new wiring and to what. I've been running just main neg and positive but I'm sure my time is limited and I leave for work at 7 am tomorrow. As luck has it my mothers car stranded me 60 miles from home cause her cars alternator went out. gremlins out to get me!

Share this post


Link to post
Share on other sites

Anybody have any ideas.

Share this post


Link to post
Share on other sites

Take a cab, order the plug and play regulator eliminator and use the internally regulated alt. Take yours off and have it tested before you go any further and blow up your battery or catch the car on fire.

Share this post


Link to post
Share on other sites

It's not really clear what you've tried. You hooked S to power, and connected the white and yellow wires, then K to battery. ??? Did you follow the directions in Post 3 (my Post 2 link was only good for later 280Zs)?

Squealing and idle reduction sounds like power generation. Why didn't you leave it like that?

Share this post


Link to post
Share on other sites

OK, sorry. Right now, I have 12 volts at A and the battery terminal. I have a good ground at the alt and battery. The white wire is jumpered to the yellow wire and it has 12 volts all the time, key on and key off. The white/black wire is jumpered to the black and white wire and has no voltage ever. If I try and run a hot 12volt key on only wire to the WB wire it charges at 15volts and climbs to 17 when you rev the engine, causing the yellow wire to become a bit hot. Yellow going to to of T and WB go ing to the stem of the T connector. How that helps. I do apologize. I know cars and datsuns pretty well and i'm so frustrated with this ordeal. I have no internet sowith in 5 miles of my house and then i'm still stuck on my phone. Thanks for your patience,

Share this post


Link to post
Share on other sites

Pa. Three are no cabs, only buses, and I have been taking them miles to and from work and I know thus isn't that hard i'm either missing something or

My car is.

Share this post


Link to post
Share on other sites

OK. So. I'm not as dumb so was beginning to think I was. fricken Napa sucks a big fat one. The new alt was bad. Out put voltage was 17 volts. I erupted it right the first time. A week later and allot of bus rides, have to order a new alternator from the main land for next week. 79 240zx it is. Thanks so much guys,

Share this post


Link to post
Share on other sites

I would also go for the regolator eliminator plug, saves a bunch of work and headachs, like frying the diods in a new alt that you are buying from over 1000 miles away. Call me crazy, but I think it would be worth every penny.

Share this post


Link to post
Share on other sites

ID: 16   Posted (edited)

If they don't jump a wire to sense the alternator will put out 17 volts as its trying to put out all it can because it has nothing to gauge its output by. Newer alternators need to sense voltage from a battery to operate properly and many shops don't know how to test much other than a 10si chevy alt. Even with the proper adapter plugs on their test benches they fail miserably. Be weary. I'm curious to see how this plays out. Good luck. You have my number if you get stuck too bad, I can walk you through bypassing all car harness aspects for charging to get you going.

Edited by MotoManMike

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Who's Online   19 Members, 0 Anonymous, 150 Guests (See full list)

  • Search Engine Meta Tags:
    classic, z, datsun, 240z, 260z, 280z, zcar, zed, s30, classiczcars.com, 240z.org, fairlady, 240, 260, 280, nissan, 240 z, 260 z, 280 z, zx, turbo, classic z, 280z cars, cars 240z, car forums, datsun, nissan, cars datsun, car club, 280zx, car, nissan zcar, classic z car