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Home / Electrical / Instrument Lighting /MS25041 Press-To-Test Indicator
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MS25041 Press-To-Test Indicator

24 Reviews 6 Answered Questions
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Overview

Miniature press-to-test indicator with built-in bulb testing device. Adjustable dimmer. Uses #330 (12V) or #327 (24V) bulb. Bulbs NOT included, order separately.

Part numbers for replacement bulbs are 11-04016 (GE-330) and 11-04015 (GE-327). See "Accessories" tab to purchase.

Reference Chart

Description
Part No.
Press-To-Test MS25041-1 Clear
11-04226
Press-To-Test MS25041-3 Green
11-03911
Press-To-Test MS25041-10 Blue
11-04227
Press-To-Test MS25041-2 Red
11-03910
Press-To-Test MS25041-4 Amber
11-03912

Documents

  • Accessories
  • Frequently Purchased With
  • Customers Also Viewed

Reviews

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Works perfectly. Nice replacement for original assembly and can now replace the bulb instead of the entire assembly

Datchair L Verified Purchase

Press-To-Test MS25041-3 Green
July 9, 2024

Straight F Verified Purchase

Press-To-Test MS25041-3 Green
August 22, 2023

Straight F Verified Purchase

Press-To-Test MS25041-4 Amber
August 22, 2023

Works as advertised

Glen F Verified Purchase

Press-To-Test MS25041-3 Green
July 2, 2023

Good product

Shawn G Verified Purchase

Press-To-Test MS25041-4 Amber
April 7, 2023

excellents

Grk E Verified Purchase

Press-To-Test MS25041-1 Clear
April 7, 2023

Seems to work as advertised, No Issues. Good Quality!

John C Verified Purchase

Press-To-Test MS25041-3 Green
January 26, 2023

These work great. Wrote a positive review earlier.

Owl E Verified Purchase

Press-To-Test MS25041-4 Amber
January 8, 2023

great

Dan B Verified Purchase

Press-To-Test MS25041-2 Red
September 17, 2022

Expensive but worth the look and functionality.

Philip A Verified Purchase

Press-To-Test MS25041-2 Red
February 18, 2022

Q&A

Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: It says miniature but does not mention a size. What is mounting hole size and diameter of light?

The mounting hole should be approx 15/32", and the lens is .650".

Q: What are the part numbers for the bulbs?

Part numbers for replacement bulbs are 11-04016 (GE-330) and 11-04015 (GE-327). See "Accessories" tab to purchase.

Q: There are 3 prongs on the back of Press to test indicator. Which tab is used for which?

There are three prongs labeled labled 1, 2 and 3. When hooked up, 1 is ground, 1 & 3 is on and 1 & 2 is off.

Q: Which 2 prongs on the MS25041 indicators are used for push to test function? 1&2 or 1&3?

We have added a drawing to the 'Documents' tab of this web page. Please review the details by downloading the PDF.

Q: Can the MS25041 press-to-test indicator lights be used in certified aircraft?

Yes, these are MIL spec units and can be used in certified aircraft per the manufacturer.

Q: What is the electrical consumption MS25041-10?

If the aircraft is 14v you would use the ge-330(14V .08A) or if 28v (28V .04A.) It would depend on your voltage.

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