1992 1HD-T dash light confusion (1 Viewer)

[Turbobrick211]

Hey folks. I just finished rebuilding my engine after a rod bearing failure and am now having some confusing dash light issues. I have the trans temp light, timing belt light, fuel filter light, and both boost lights on all the time. I was thinking that I missed a ground wire, which i had, but after fixing it hasn't changed. I can't seem to fond a good wiring diagram to guide me. And I don't know what to do. The truck runs great, but id really like to get these lights back to normal.


Please help

 

[Eurasiaoverland]

It's not charging. Test the alternator, check the brushes and regulator etc.

 

[Turbobrick211]

It's not charging. Test the alternator, check the brushes and regulator etc.

It's charging great. 14.5V

 

[mudgudgeon]

The christmas tree dash lights is an indication of a bad ground connection somewhere
(could be in the engine bay, or the instrument cluster), or indication of a bad alternator, or a bad connection at the alternator.

Given that you had the engine out, double check alternator connectors are clean and getting good contact.

Also check all circuits to the alternator are good.

And trestle check all ground wires are back, abs have good clean connections to ground

 

[Turbobrick211]

The christmas tree dash lights is an indication of a bad ground connection somewhere
(could be in the engine bay, or the instrument cluster), or indication of a bad alternator, or a bad connection at the alternator.

Given that you had the engine out, double check alternator connectors are clean and getting good contact.

Also check all circuits to the alternator are good.

And trestle check all ground wires are back, abs have good clean connections to ground

Update. I cleaned all the battery terminals and lugs, cleaned and checked all the battery and chassis ground wires, tightened the alternator connectors and checked all the fuses. Nothing helped. Then I checked the power at the alternator fuse, and it was less than a volt while running, even thought the alternator was putting out 14.4v. I made a jumper wire from the battery positive terminal and spliced it to the larger wire feeding the alternator fuse, and the lights have gone out and everything seems back to normal.