Voltage regulator

rotedog

rotedog

New member
I have a 1986 cj-7 that originally had the 258ci v-6. I swapped the v6 for a 304 out of my 1976 cj5. I think my voltage regulator is bad so I started to replace it and the regulator that is in it now I think is still the one from the v6. It has a wiring harness with 8 wires, the new. one i bought for the 1976 304 wires up completely different. Can anybody help me with this?
 

If I understand what you're saying, the 86 would have had a delco style altenator with an internal regulator and a simple single post connect (and two slot wire clip on the top). The 304 from a 76 would have likely had an external regulator. Maybe you have mix matched the parts?
 
Yes, the 86 did have the Delco with the 2 slot wire clip. There is what I thought was the regulator from the 86 motor still mounted to the inside of the fender well, I didn't swap the motors myself, but i do remember that box being mounted there when I still had the 86 motor. So if the 86 didn't have an external regulator do you know what that box would be?
 
If I can make it fit can I just go back with the single wire Delco alternator that doesn't need the external regulator?
 

Is the box on the drivers fender well with two seperate wire pigtail coming off the bottom of it? If so, it is the ignition module for a dura-spark unit (emissions equipped vehicle).
 
Yes, if the wiring harness is from the 86 CJ, you can very re-use the delco alt. Depending on what distributor you are planning on using, you will have a little re-wiring to do, but fairly straight forward.
 
I have a 2000 Jeep Grand Cherokee 4.0. Several months agothe Jeep was starting but not very well...... Not the usual crank that I amnormally accustomed to. It was like the batter was getting old and would needreplaced soon. So.... one night I took the Jeep to Auto Zone for a replacementbattery. I replaced the battery and still I was getting the same ole drainedstart. Yes, it was starting but..... a very weak and drained start. There werealso some times where I would drive about 3 or 4 miles to the nearest storefrom my house and when I would get back in the Jeep to crank and drive, itwould not start. (You know the same ole usual rerr rerr rerr) "deadbattery sound" But then after a few minutes I would try starting it againand it would crank. However the crank was a very weak one. I finally bit thebullet and took the Jeep to a local ASE Certified mechanic and he called me afew days later saying that he had replaced my alternator and it was ready to goand oh yea you owe me 320 bucks........ Sucks! Anyways, my wife took me to getthe Jeep from the mechanic and upon payment I proceeded to go outside and crankmy Jeep. Once again I had a weak start...... "This mechanic replaced myalternator and now it still is doing the same thing"....... Reluctantly Idrive the Jeep home and ate dinner with my wife. After dinner I thought tomyself..... why not go outside and try to crank the Jeep....? So.... I wentoutside and tried. It did the usual rerr rerr click.... sputter click.... andthen it would not move the engine again....... So....... besides the fact thatI was mad...... I remembered ump starting the Jeep a couple months before atour local grocery store. When I jump started the Jeep a couple weeks back, ittook a while for the battery to get charged, however it finally cranked theJeep. This time I had no such luck. The engine wouldn't even turn over. So.....I thought, "it has got to be the battery". So.... thinking that thebattery was dead.... I took the batteryto the local auto zone to have it tested. Much to my surprise, the technician letme know my battery was fully charged and fine. So.... i went ahead andpurchased a new starter. I replaced the starter and put the battery back in theJeep yesterday and yes I still have the same problem. When I turn the key, I amgetting a weak clicking noise from my fuse box located on the passengers sideof the engine compartment. At this point I have no idea whats going on or whatto do...... All connections are connected and everything is put back togetherright. Click click click

PLEASE HELP ME!
 

Lucast100 said:
I have a 2000 Jeep Grand Cherokee 4.0. Several months agothe Jeep was starting but not very well...... Not the usual crank that I amnormally accustomed to. It was like the batter was getting old and would needreplaced soon. So.... one night I took the Jeep to Auto Zone for a replacementbattery. I replaced the battery and still I was getting the same ole drainedstart. Yes, it was starting but..... a very weak and drained start. There werealso some times where I would drive about 3 or 4 miles to the nearest storefrom my house and when I would get back in the Jeep to crank and drive, itwould not start. (You know the same ole usual rerr rerr rerr) "deadbattery sound" But then after a few minutes I would try starting it againand it would crank. However the crank was a very weak one. I finally bit thebullet and took the Jeep to a local ASE Certified mechanic and he called me afew days later saying that he had replaced my alternator and it was ready to goand oh yea you owe me 320 bucks........ Sucks! Anyways, my wife took me to getthe Jeep from the mechanic and upon payment I proceeded to go outside and crankmy Jeep. Once again I had a weak start...... "This mechanic replaced myalternator and now it still is doing the same thing"....... Reluctantly Idrive the Jeep home and ate dinner with my wife. After dinner I thought tomyself..... why not go outside and try to crank the Jeep....? So.... I wentoutside and tried. It did the usual rerr rerr click.... sputter click.... andthen it would not move the engine again....... So....... besides the fact thatI was mad...... I remembered ump starting the Jeep a couple months before atour local grocery store. When I jump started the Jeep a couple weeks back, ittook a while for the battery to get charged, however it finally cranked theJeep. This time I had no such luck. The engine wouldn't even turn over. So.....I thought, "it has got to be the battery". So.... thinking that thebattery was dead.... I took the batteryto the local auto zone to have it tested. Much to my surprise, the technician letme know my battery was fully charged and fine. So.... i went ahead andpurchased a new starter. I replaced the starter and put the battery back in theJeep yesterday and yes I still have the same problem. When I turn the key, I amgetting a weak clicking noise from my fuse box located on the passengers sideof the engine compartment. At this point I have no idea whats going on or whatto do...... All connections are connected and everything is put back togetherright. Click click click

PLEASE HELP ME!
Click to expand...

Maybe one of the Moderators could move this to the correct category and start a new thread?
 
You are getting a click, click from the fuse box under the hood? Sounds like a relay fuse, it is the large square black fuses, could be for the starter, fuel pump, charging (alt). You can swap them around two at a time to see if one is bad, if after swaping them around, it does the same thing, I wouldn't think relay anymore. But if the click is coming from the fuse box, one would think fuse or relay I think.
 
Since this post has not moved to a new thread , I thought I would offer a somewhat solution to your problem. My family owns the same jeep and experiences intermittant electrical problems as well . Not having the correct manual for this year , I generically googled this make for its fault and found a post that interested me and made perfect sense . I first thought starter when reading first post if battery voltage was found to be good , but when you mentioned clicking , yes try swapping relays as 69jeepcj has advised. If that does not help , try to google as I did " starter system 2000 jeep grand cherokee " and look for a CNET forum post from nov. 16 , 2007 . I found it VERY interesting in the way that our jeeps have become way too modern with way too many accessories and creature comfort that will eventually plague the owner with nothing but headache and heartache in future years . Don't get me wrong , they are GREAT additions and my mom and dad love them , but when you can't even start your own jeep or use one of these options , a jeep owner gets upset and irate as your feeling now. That is why I appreciate older iron such as the jeep that 69jeepcj owns and operates . In a nutshell , the post points toward a PCI link ( not unlike a desktop computer ) that is found in the data communication link ( plug where diagnostic and yearly inspection is performed ) is to fault . Yes , it is a power supply link fault that supplies power to the MANY modules and PCM that basically control EVERYTHING on board your jeep and all jeeps of the computer era . All things being equal , I'd rather be in Philadelphia ( w.c. Fields) driving a pre-computerized CJ ! Hope this helps point you in the right direction and fixes it once and for all and saves you money for years to come ! If 69jeepcj or policemonkey161 had their hands on it , it would not take long to find that it is PCM (on-board computer ) related and that's where the fun begins . Best of luck , hope your jeep fares well and your luck turns better than my mom and dads jeep . Greg
 
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Well, I am stumped again. I went by a local shop to ask for advice about my problem. The old Delco alternator that I took off had a slot to plug in a 2 wire clip, the new Motorcraft alternator didn't have this slot so by mistake the 2 wire clip didn't get hooked back up to anything. When I went by the local shop to ask advice they saw the wire and suggested that I cut the plastic clip from the wires (since the motorcraft didn't have the slot to plug it in to) and clip on a loop terminal on each wire, connect one wire to the insulated terminal on the back of the alternator and the other to a ground terminal on the back of the alternator. I did this and thought it had fixed my problem because now I was getting almost 14 volts on my volt meter when I checked it at the battery. But now something is draining my battery while it is parked. I can put my meter on the battery and I can watch it slowly drain. Does anyone have any ideas?
 
I know this sounds crazy but I'm not sure I'm even running a voltage regulator at this point. The small box that's mounted to the passenger side fender well is obviously not a regulator. It has eight wires coming out of it and most regulators have only four. Plus I completely unhooked it and it seems to have already been bypassed because it makes no impact on the motor running. Somebody suggested that it may have been some kind of emissions control at one time. My alternator is charging now but I'm afraid it may be sending too much voltage to my battery. Is this even possible and if so will that ruin my battery?
 

Yes, I cut the plastic clip off and crimped a loop terminal on each wire. I put the one wire on the other insulated terminal on the alternator and I put the other wire on what I'm pretty sure is a ground terminal on the alternator. Do I need to unhook the ground wire?
 
Try unhooking the ground (that you just made), if your battery drain stops that is the problem. I don't have any schematics with me (at work), but I believe this to be your problem.
 

Ok, I'm fixing to head home from work now and I'll try that when I get home. Thanks
 
Ok, got it fixed. Thanks so much for the help and the link to the website. The wiring diagram I got from autorewire was exactly what I needed. My jeep is running and charging like a top now. Thanks again.

Jody
 
rotedog said:
Ok, got it fixed. Thanks so much for the help and the link to the website. The wiring diagram I got from autorewire was exactly what I needed. My jeep is running and charging like a top now. Thanks again.

Jody
Click to expand...

Awesome!.......... Hope you stick around and enjoy the forum....
 

Was just wondering what has become of your '76 cj5 ? Any plans for it ? If contemplating a sale , what condition is the chassis and body tub ?
 
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