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Yak-List Digest: 1 Msgs - 05/26/24

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Clouddog

Joined: 02 Jun 2016
Posts: 119
Location: Lebanon, TN

Posted: Thu May 30, 2024 4:02 am Post subject: Yak-List Digest: 1 Msgs - 05/26/24

Harv,



I'm not aware of any fuse prior to the Master switch. It is a pain but have you checked the voltage at the master switch. The master switch may have failed internally and although you have turned it on, the contacts are not switching over. I have had switch fail before. Turned it on and nothing happened.

Greg Wrobel 

On Mon, May 27, 2024, 01:35 Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)> wrote:



 	  Quote: 	
		  *

 

  =========================

    Online Versions of Today's List Digest Archive

  =========================

 

 Today's complete Yak-List Digest can also be found in either of the 

 two Web Links listed below.  The .html file includes the Digest formatted 

 in HTML for viewing with a web browser and features Hyperlinked Indexes 

 and Message Navigation.  The .txt file includes the plain ASCII version 

 of the Yak-List Digest and can be viewed with a generic text editor 

 such as Notepad or with a web browser. 

 

 HTML Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2024-05-26&Archive=Yak

 

 Text Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2024-05-26&Archive=Yak

 

 

  =======================

    EMail Version of Today's List Digest Archive

  =======================

 

 

            ----------------------------------------------------------

                            Yak-List Digest Archive

                                       ---

                      Total Messages Posted Sun 05/26/24: 1

            ----------------------------------------------------------

 

 

 Today's Message Index:

 ----------------------

 

      1. 11:15 PM - Cj6 no battery power  (Harv)

 

 

 

 ________________________________  Message 1  _____________________________________

 

 

 Time: 11:15:58 PM PST US

 Subject: Cj6 no battery power

 From: "Harv" <martin.harvey(at)kbr.com (martin.harvey(at)kbr.com)>

 

 

 I experienced something strange yesterday which Ive not come across with my CJ

 before.

 

 Aircraft is in use but toddy theres no power at all to the switches in the front

 cockpit?

 

 Ive checked the batteries and they seem ok at around 13v each ( charged them anyway)

 

 Does anyone know if theres a master power fuse in the AC which is hidden somewhere

 that I might have overlooked?

 

 I removed all the glass fuses in the black box unit behind the pilot seat and these

 all look good.

 

 Any ideas appreciated 

 

 Thanks

 

 Harv

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=513606#513606

 

 

 

 

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draftsjust417(at)gmail.co
Guest

Posted: Thu May 30, 2024 5:00 am Post subject: Yak-List Digest: 1 Msgs - 05/26/24

Hey Harv,

How frustrating. 

I agree w/ Greg W, these blocky switches on the CJ's front cockpit's row of toggle switches are

internal fuse type (like a built-in circuit breaker), and they get old and can go bad, or can be susceptible

to corrosion/oxidation. Thankfully they're not that expensive and not really difficult to replace.  

Having done it before, my advice (from the backseat) is to start by replacing the master switch, or doing

a simple continuity check w/ multimeter from the switch's back side. 

The Chinese made the access to the back side of the switch bank pretty straightforward, via fuselage 

access panel on the front L/H side of the nose, just behind the cowlings.  Think I have photos, if you'd like.

Best,

Justin Drafts

draftsjust417(at)gmail.com (draftsjust417(at)gmail.com)

On Thu, May 30, 2024 at 5:06 AM Greg Wrobel <clouddog22(at)gmail.com (clouddog22(at)gmail.com)> wrote:



 	  Quote: 	
		  Harv,



I'm not aware of any fuse prior to the Master switch. It is a pain but have you checked the voltage at the master switch. The master switch may have failed internally and although you have turned it on, the contacts are not switching over. I have had switch fail before. Turned it on and nothing happened.

Greg Wrobel 

On Mon, May 27, 2024, 01:35 Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)> wrote:



 	  Quote: 	
		  *

 

  =========================

    Online Versions of Today's List Digest Archive

  =========================

 

 Today's complete Yak-List Digest can also be found in either of the 

 two Web Links listed below.  The .html file includes the Digest formatted 

 in HTML for viewing with a web browser and features Hyperlinked Indexes 

 and Message Navigation.  The .txt file includes the plain ASCII version 

 of the Yak-List Digest and can be viewed with a generic text editor 

 such as Notepad or with a web browser. 

 

 HTML Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2024-05-26&Archive=Yak

 

 Text Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2024-05-26&Archive=Yak

 

 

  =======================

    EMail Version of Today's List Digest Archive

  =======================

 

 

            ----------------------------------------------------------

                            Yak-List Digest Archive

                                       ---

                      Total Messages Posted Sun 05/26/24: 1

            ----------------------------------------------------------

 

 

 Today's Message Index:

 ----------------------

 

      1. 11:15 PM - Cj6 no battery power  (Harv)

 

 

 

 ________________________________  Message 1  _____________________________________

 

 

 Time: 11:15:58 PM PST US

 Subject: Cj6 no battery power

 From: "Harv" <martin.harvey(at)kbr.com (martin.harvey(at)kbr.com)>

 

 

 I experienced something strange yesterday which Ive not come across with my CJ

 before.

 

 Aircraft is in use but toddy theres no power at all to the switches in the front

 cockpit?

 

 Ive checked the batteries and they seem ok at around 13v each ( charged them anyway)

 

 Does anyone know if theres a master power fuse in the AC which is hidden somewhere

 that I might have overlooked?

 

 I removed all the glass fuses in the black box unit behind the pilot seat and these

 all look good.

 

 Any ideas appreciated 

 

 Thanks

 

 Harv

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=513606#513606

 

 

 

 

 ===========

 List" rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/Navigator?Yak-List

 ===========

  FORUMS -

 eferrer noreferrer" target="_blank">http://forums.matronics.com

 ===========

 WIKI -

 errer noreferrer" target="_blank">http://wiki.matronics.com

 ===========

 b Site -

           -Matt Dralle, List Admin.

 ="noreferrer noreferrer" target="_blank">https://matronics.com/contribution

 ===========

- The Matronics Yak-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List

Mark Pennington

Joined: 18 Jul 2022
Posts: 11
Location: Richmond Virginia

Posted: Thu May 30, 2024 5:54 am Post subject: Yak-List Digest: 1 Msgs - 05/26/24

Harv



I own and operate a CJ.  

The Master Switch is hot on one side at all times.  When you turn it on, it pulls in the contactor that is in the vertical black box behind your right elbow on the cross member.

When that pulls in it applies power to all of the switches, alternator etc.

The back of the switch panel comes off with two thumb screws and if you get in the plane and lay on your back you can put a voltmeter on the terminals of the master switch.  There should be 24 volts or so on one of the screws.  If there is and you turn it on and if you dont hear that contactor pull in.

Either the switch is bad or the contactor is bad.   To check the switch take off both wires and use the ohms reading function and see if the switch goes from open circuit to close to a dead short.  

You can't check the switch using power unless you remove the wire on the output side of the switch.

If you would like some more info please feel free to call at any time.

Mark Peninngton

Richmond VA

N621CJ

804-399-4224

Virus-free.www.avast.com[url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2][/url]



On Thu, May 30, 2024 at 8:06 AM Greg Wrobel <clouddog22(at)gmail.com (clouddog22(at)gmail.com)> wrote:



 	  Quote: 	
		  Harv,



I'm not aware of any fuse prior to the Master switch. It is a pain but have you checked the voltage at the master switch. The master switch may have failed internally and although you have turned it on, the contacts are not switching over. I have had switch fail before. Turned it on and nothing happened.

Greg Wrobel 

On Mon, May 27, 2024, 01:35 Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)> wrote:



 	  Quote: 	
		  *

 

  =========================

    Online Versions of Today's List Digest Archive

  =========================

 

 Today's complete Yak-List Digest can also be found in either of the 

 two Web Links listed below.  The .html file includes the Digest formatted 

 in HTML for viewing with a web browser and features Hyperlinked Indexes 

 and Message Navigation.  The .txt file includes the plain ASCII version 

 of the Yak-List Digest and can be viewed with a generic text editor 

 such as Notepad or with a web browser. 

 

 HTML Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2024-05-26&Archive=Yak

 

 Text Version:

 

     http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2024-05-26&Archive=Yak

 

 

  =======================

    EMail Version of Today's List Digest Archive

  =======================

 

 

            ----------------------------------------------------------

                            Yak-List Digest Archive

                                       ---

                      Total Messages Posted Sun 05/26/24: 1

            ----------------------------------------------------------

 

 

 Today's Message Index:

 ----------------------

 

      1. 11:15 PM - Cj6 no battery power  (Harv)

 

 

 

 ________________________________  Message 1  _____________________________________

 

 

 Time: 11:15:58 PM PST US

 Subject: Cj6 no battery power

 From: "Harv" <martin.harvey(at)kbr.com (martin.harvey(at)kbr.com)>

 

 

 I experienced something strange yesterday which Ive not come across with my CJ

 before.

 

 Aircraft is in use but toddy theres no power at all to the switches in the front

 cockpit?

 

 Ive checked the batteries and they seem ok at around 13v each ( charged them anyway)

 

 Does anyone know if theres a master power fuse in the AC which is hidden somewhere

 that I might have overlooked?

 

 I removed all the glass fuses in the black box unit behind the pilot seat and these

 all look good.

 

 Any ideas appreciated 

 

 Thanks

 

 Harv

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=513606#513606

 

 

 

 

 ===========

 List" rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/Navigator?Yak-List

 ===========

  FORUMS -

 eferrer noreferrer" target="_blank">http://forums.matronics.com

 ===========

 WIKI -

 errer noreferrer" target="_blank">http://wiki.matronics.com

 ===========

 b Site -

           -Matt Dralle, List Admin.

 ="noreferrer noreferrer" target="_blank">https://matronics.com/contribution

 ===========

- The Matronics Yak-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List

_________________
Responding from my iPhone, please disregard any typos.

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