No lights issue

Slooptin · Thursday at 5:13 PM

Finished putting my truck back together and it runs great, but I don’t have any lights (interior or exterior). Went through the whole troubleshooting process and found that my wires are good (continuity tests passed), but I’m still not getting power to the headlamp switch. I think I narrowed it down to a faulty “s” terminal on the starter since I can jump the two s terminal wires to the junction block on the firewall and I kinda get headlights (see pic below). Just wanting a sanity check that this is the issue. I also drew up a bare bones wiring diagram from what I’ve found

DrvnDrvr · Thursday at 6:17 PM

Check your fuses.

Ricko1966 · Thursday at 7:27 PM

You have the wires on the starter wrong. The fusible links and the battery cable go on the large post,only the solenoid exciter goes on the s terminal

Slooptin · Thursday at 10:58 PM

DrvnDrvr said:
Check your fuses.

Fuses are all good

Ricko1966 · 2024-11-15T03:18:22-0500

For everyone's benefit and to save troubleshooting time,a fuse will not take out headlights on a factory wired Squarebody truck. They get power from an under hood fusible link at the starter and by the headlight switch itself which has an internal circuit breaker.Dash and taillights are fused.

Jgonick · 2024-11-15T07:25:40-0500

One of the red wires (with fusible link) at the starter runs to the bulkhead. At the bulkhead (inside cab) it splits into two red wires- one runs to fuse box for tail lamps & ctsy etc. The other runs directly to headlight switch. If "NO" lights are working- I would be looking at the fusible link and making sure it is connected correctly at starter.

Ricko1966 · 2024-11-15T10:07:41-0500

Jgonick said:
One of the red wires (with fusible link) at the starter runs to the bulkhead. At the bulkhead (inside cab) it splits into two red wires- one runs to fuse box for tail lamps & ctsy etc. The other runs directly to headlight switch. If "NO" lights are working- I would be looking at the fusible link and making sure it is connected correctly at starter.

He's not hooked up at the starter correctly. He drew us a diaghram on post 1. Take a look, not bagging on you. But if you look at his diaghram and confirm what I said,maybe others and the O.P. will know the problem is found before we get 97 WAGs to confuse the issue.

Slooptin · 2024-11-15T12:22:19-0500

So fusible links are good I’m assuming since continuity tests were good. I definitely had it wired wrong. Thanks Ricko1966!

Jgonick · 2024-11-15T14:58:09-0500

Ricko1966 said:
look at his diaghram and confirm

Jgonick said:
and making sure it is connected correctly at starter

I should of looked closer at his diagram & stressed the starter connection more. Glad Ricko1966 stayed focused.

Ricko1966 · 2024-11-15T16:42:39-0500

Slooptin said:
So fusible links are good I’m assuming since continuity tests were good. I definitely had it wired wrong. Thanks Ricko1966!

Thanks fir the pic it made it easy. Unlike the posts that just have us guess at everything. My lights don't work,but they used to,what do you think it could be???

No lights issue

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