1990 Dodge Dynasty error code 41

HARGY

MEMBER
1990 DODGE DYNASTY
150,000 MILES

The car will start and all runs fine. But I have the error code 41 from the engine. It is a new alternator (2nd one because the first did same thing) and it is not charging. On the connector block that is bolted onto the alternator, there is one terminal that is not insulated and bolt directly to the alternator case. Upon checking the continuity with this lead and the main lead that goes to the battery, they are connected or shorted inside the block. Is this supposed to be like this. The 2 middle terminals on this block go to the computer and I have check them to the connector for the computer. They have no breaks or shorts. The alternator is new and the asd relay are new. I am not sure where to go from here. Do I need a new cable or computer module?

2 Replies

HMAC300

MECHANIC
48,601 POSTS

See if this wire in chart is connected to alternator at plug and is getting power.

Image (Click to make bigger)

Was this

answer

helpful?

Yes

No

+1

Tuesday, August 20th, 2013 AT 12:24 PM

HARGY

MEMBER
2 POSTS

Yes, the black wire that goes to the battery does have power. I have found the problem. The mounting bracket that is shown in my photo was shorting inside the connector block that bolts on to the alternator. The main wire in the block that goes to the battery was a little loose. (Not really firm in the molded block). Upon moving it a little there was no longer continuity between the main wire and this mounting lug. After reattaching everything and starting engine, the check engine light was gone and the alternator was charging. This loose condition in that molded block on the alternator is what was causing the problem. Not wanting to cut off that mounting lug, I simply insulated it before attaching the block to the alternator. I suppose a new cable would be in order, but I have already spent way too much money getting the car back running.