Lee21490 Posted March 24, 2014 Share Posted March 24, 2014 So i've been getting Code 41 An open or shorted condition detected in the generator field control circuit.Every now and then when i start up my 'manche. And i've started to notice the alt. doesn't kick in & charge until 20~ seconds after i start the engine. But once it does, It works fine And reads a solid 14v. What would cause it not to start charging for the first half a minute of starting? I'm really not an electrical guy :/ 95 4.0L in a 86 'manche Link to comment Share on other sites More sharing options...
1989 Eliminator Posted March 24, 2014 Share Posted March 24, 2014 How is the ground on the side of the engine block? Is it dirty and covered with oil? Did you upgrade your grounds at all? Link to comment Share on other sites More sharing options...
Lee21490 Posted March 24, 2014 Author Share Posted March 24, 2014 How is the ground on the side of the engine block? Is it dirty and covered with oil? Did you upgrade your grounds at all? The grounds all look fine, They're clean & Not corroded at all. Link to comment Share on other sites More sharing options...
yxmj Posted March 24, 2014 Share Posted March 24, 2014 If your grounds are good and your belt is tight (no squealing) and you have what appears to be a strong voltage after 20 seconds my best guess would be your brushes....reasonably easy fix....brushes are about $12 a set. Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 24, 2014 Share Posted March 24, 2014 Check the alternator connections themselves, especially the terminals that hold the little black module to the alt. Make sure they are clean and tight. And don't just look at the engine grounds, tighten them up. Dipstick, firewall, and block ground. Link to comment Share on other sites More sharing options...
Lee21490 Posted March 25, 2014 Author Share Posted March 25, 2014 Check the alternator connections themselves, especially the terminals that hold the little black module to the alt. Make sure they are clean and tight. And don't just look at the engine grounds, tighten them up. Dipstick, firewall, and block ground. They're all tight & clean. Just doubled checked them this morning. What module? All i see coming out of the alt. Is a single large cable, Which heads towards the battery. /e Found it, It was WAY hidden in the back lol Tightened it up & it seems to be working fine now :D Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 25, 2014 Share Posted March 25, 2014 Yes, it's part of the engine harness and fastens on the back of the alt. Should have mentioned that.......... I hope that does it. Link to comment Share on other sites More sharing options...
Lee21490 Posted March 26, 2014 Author Share Posted March 26, 2014 Yes, it's part of the engine harness and fastens on the back of the alt. Should have mentioned that.......... I hope that does it. Was too good to be true. For some reason it worked great after tightening it for the rest of the day, Then did the same thing the next day & Is dropping down to 12v when i put any sort of draw on it. Guess its time to get a new one. Not sure if i want to go with stock, Or get a higher amperage Link to comment Share on other sites More sharing options...
54bobby Posted March 26, 2014 Share Posted March 26, 2014 check to make sure all wires are tight. mine did the same thing and it was a loose ground. get it bench tested too. Link to comment Share on other sites More sharing options...
HOrnbrod Posted March 26, 2014 Share Posted March 26, 2014 Yes, it's part of the engine harness and fastens on the back of the alt. Should have mentioned that.......... I hope that does it. Was too good to be true. For some reason it worked great after tightening it for the rest of the day, Then did the same thing the next day & Is dropping down to 12v when i put any sort of draw on it. Guess its time to get a new one. Not sure if i want to go with stock, Or get a higher amperage Bummer. well, if you have to change it, you might as well upgrade it to the ZJ (and others) 136A alternator. Get your alt checked first though to make sure it is definitely bad and not a ground or harness problem. I did the 136A conversion a few years ago and it fit right in w/o any grinding. Other install write-ups claim you had to grind the brackets a bit to get it in. Mine fit in okay, but it was a squeeze. The one you are looking for is the Nippon Denso 136A, externally regulated, p/n 56027913. It can be found in the following vehicles: Link to comment Share on other sites More sharing options...
Recommended Posts
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 accountSign in
Already have an account? Sign in here.
Sign In Now