No power to radio fuse. (Page 1/3)
Chief08 JAN 06, 03:26 PM
So the yellow power wire to the radio has no power to it.
-Tested for open, wire checked out.
-Tested fuse and it was good, but no power to the fuse.
- checked in accy and run, no power.
- the wiper fuse has the same issue.
Any suggestions on where to go from here?
Rexgirl JAN 06, 04:23 PM
Is there power on the ignition switch's brown wire with the switch in the "Run" position ?
Chief08 JAN 06, 04:48 PM

quote
Originally posted by Rexgirl:

Is there power on the ignition switch's brown wire with the switch in the "Run" position ?



I assume so, all but the radio and wiper fuses get power, and the car starts etc.
Gall757 JAN 06, 05:36 PM
Key On?

[This message has been edited by Gall757 (edited 01-09-2021).]

Chief08 JAN 06, 05:38 PM

quote
Originally posted by Gall757:

Key on?



Yes, no power to the radio and wiper fuses in accy, or run positions.
dremu JAN 06, 08:26 PM
Overall, you really need a copy of the GM manual. Get one on Ebay or the like. You didn't say what year yours is, but assuming it's NOT an '84 and is otherwise like my '87, here's a copy of the relevant page that's easier to read than the above. (I'm old and really like easy to read )



See "Hot in accy or run" on the left; says "3 BRN" and goes to pin A on the ignition switch. Check voltage both ends of that wire, and then start considering the switch.

Note that the switch can be adjusted slightly as the pushrods are never quite perfect, get bent and such with age and use. My experience with the Saginaw columns is that when the switch is out of adjustment it usually manifests as a no-start, or you have to crank the key really hard to get the switch to engage. Be odd to manifest as losing *some* functions, but hey, it's a Fiero, odd is what we do. Worst case, unplug the connectors on the switch and re-seat them. Free, if not exactly easy (unless you enjoy being upside down and have arms like a midget and six elbows.)

-- A

[This message has been edited by dremu (edited 01-06-2021).]

Chief08 JAN 07, 12:46 PM
So I checked the brown wire from the ignition switch to the fuse box and it seems ok, no open, shows voltage. Not sure what to do next.
Rexgirl JAN 07, 02:51 PM
If brown wire's pin in the connector at the fuse box has power, then the problem is in the fuse box. Btw, my car had a few iffy fuse holders in the fuse box.
theogre JAN 07, 03:25 PM
So You have power on both ends of brown wire as show above? But Not power for 2 fuses?

Replace both fuses if not done already. Fuses can fail in several ways and may test is "good" but isn't. Use Littlefuse or other good brands. No brand like most sold at "dollar stores" have more problem w/ cheap made.

Does fuses go in very easy?
If tested fuse "box" w/ crap tester like has think probes then maybe damage to the plugs.

Must disconnect battery before this step...
Many Fuse plugs are tied together in the block. You have to make several "tool" to release them all before will pull out the back.
Think is same thing in See my Cave, Defect & Connection notes but that only has 1 wire to a terminal. Not sure has TPA either and not looking in my car.
If same method need to make 2 or more tools.

Once you get it out of box. put a fuse in it. if not tight may try care use pliers.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

Chief08 JAN 07, 04:28 PM

quote
Originally posted by theogre:

So You have power on both ends of brown wire as show above? But Not power for 2 fuses?

Replace both fuses if not done already. Fuses can fail in several ways and may test is "good" but isn't. Use Littlefuse or other good brands. No brand like most sold at "dollar stores" have more problem w/ cheap made.

Does fuses go in very easy?
If tested fuse "box" w/ crap tester like has think probes then maybe damage to the plugs.

Must disconnect battery before this step...
Many Fuse plugs are tied together in the block. You have to make several "tool" to release them all before will pull out the back.
Think is same thing in See my Cave, Defect & Connection notes but that only has 1 wire to a terminal. Not sure has TPA either and not looking in my car.
If same method need to make 2 or more tools.

Once you get it out of box. put a fuse in it. if not tight may try care use pliers.




So I installed a keyless entry system and it works fine, but this issue came up after the install. The manufacturer says that the actual key position doesn't matter for operation, but to leave it on accy to prevent the steering from locking. I was out checking things out earlier and I turned the key to run just to see what would happen, and I got power to the yellow radio wire, but only with the key turned all the way forward. Unfortunately, the wiper and inst lights still have no power at the fuse box.