Panel light fuse location, 1978 20J ?

[Ross Statham]

Sorry if this one has been answered before, but does anyone in the brain trust know where the fuse is for the brow lights for a 1978 20J?  I was replacing one of the bulbs and apparently shorted things out. Breaker is intact but circuit is dark.  According to the schematic, there is also a fuse in the circuit. I have been unable to locate it so far, and if any of you smart folks know where it is, I’d be most appreciative.

I took the glareshield off so that I could better deal with the bulbs, and it is definitely not there. Nor can I see it close to the pot either.

ideas?

[Marauder]

  On 11/24/2022 at 7:03 PM, Ross Statham said:

Sorry if this one has been answered before, but does anyone in the brain trust know where the fuse is for the brow lights for a 1978 20J?  I was replacing one of the bulbs and apparently shorted things out. Breaker is intact but circuit is dark.  According to the schematic, there is also a fuse in the circuit. I have been unable to locate it so far, and if any of you smart folks know where it is, I’d be most appreciative.
I took the glareshield off so that I could better deal with the bulbs, and it is definitely not there. Nor can I see it close to the pot either.
ideas?

I don’t know if the fuse location changed on the 78 models from where they were on the 77 Js. They went from a quadrant to vernier control and may have moved it.

They were located directly under the radio stack on a metal plate.





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[Ross Statham]

Aaaaaaahhhhh !  Thanks will try in the am.

Ross

[PT20J]

Try looking behind the panel beneath the dimmer knobs.

 

[Ross Statham]

Thanks!  I’ll be at the hangar first thing in the am!!….Ross

[Marauder]

  On 11/24/2022 at 11:05 PM, Ross Statham said:

Aaaaaaahhhhh !  Thanks will try in the am.
Ross

And be sitting down when you see the price for those fuses (if you can find them).


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[Aerodon]

I have a complete dimmer unit with fuses if it turns out to be more than the fuse.

Aerodon

 

[Ross Statham]

Thanks guys!  I priced those fuses yesterday.  No kidding. This morning my buddy and I are on the hunt. He’s a retired electronics genius and pilot, spent a career as a troubleshooter.  I forwarded this thread last night.

Ross

[DonMuncy]

There are (or at least were) cheaper sources for those fuses. If need be, I can look to see if I can find my notes.

[Marauder]

  On 11/25/2022 at 3:46 PM, DonMuncy said:

There are (or at least were) cheaper sources for those fuses. If need be, I can look to see if I can find my notes.

Please do! None of the usual sources (Mouser, etc.) seem to be carrying them.


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[Ross Statham]

Found the blown fuse, after looking three days.  They’d been moved.  Once we found the transistors they were protecting, fuses were mounted upside down close by.  Ordered a fuse and a spare from Newark Electronics, who had a decent price.  $20 each plus shipping.

Thanks again everyone!  
 

Ross

 

[Ross Statham]

Got a message asking for details about the replacement fuse.  Here are the details:

Ordered from https://www.newark.com, SKU 19K5343.  They show it as an Eaton Electronics manufacturer part number GMW-5.  I paid $20.02 plus shipping.

Hope this helps, y'all!.....Ross

 

 

[0TreeLemur]

  On 1/25/2023 at 3:10 PM, Ross Statham said:

Got a message asking for details about the replacement fuse.  Here are the details:

Ordered from https://www.newark.com, SKU 19K5343.  They show it as an Eaton Electronics manufacturer part number GMW-5.  I paid $20.02 plus shipping.

Hope this helps, y'all!.....Ross

 

 

Expand  

Thanks for doing the leg work!   Glad they are still available.

[katzhome]

I was able to order some from Newark.  They currently have 81 in stock.  I now have my eyebrow lights operational!

https://www.newark.com/eaton-bussmann-series/gmw-5/fuse-5a-125v-fast-acting/dp/19K5343

Regards,

R.Katz