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Flasher pilot light fails
#1345168 Wed Feb 05 2020 11:08 PM
Joined: Apr 2008
Posts: 779
F
Forty9 Offline OP
Shop Shark
Using an Ledlights 6V neg gnd LED electronic flasher unit in my Grote 966-4 turn signal. This is in a 49 3100 with alternator. Turn signals work fine but pilot light goes out shortly after install. "P" terminal on flasher is dead. Ledlights advise the flasher voltage range is 5-7V whereas my alternator delivers 7.5V output. Anyone using a LED electronic flasher that will work with an alternator? Thanks


Ed
Re: Flasher pilot light fails
Forty9 #1346477 Fri Feb 14 2020 01:40 PM
Joined: Jan 2010
Posts: 4,510
D
Shop Shark
Would an led bulb in the switch (for pilot) solve this?

I have led in rear but standard in front so Im still using standard flasher

Re: Flasher pilot light fails
Forty9 #1346740 Sun Feb 16 2020 04:20 PM
Joined: Apr 2008
Posts: 779
F
Forty9 Offline OP
Shop Shark
I think the problem lies with the flasher operating voltage of 5-7 volts and my alternator puts out 7.5 volts. An LED pilot might work but at $15 a pop for the flasher, I'll have to decide if I can just live with no pilot or spring for another flasher and try the LED pilot. Thanks for the input.

Last edited by Forty9; Sun Feb 16 2020 04:21 PM. Reason: Spelling

Ed
Re: Flasher pilot light fails
Forty9 #1348552 Mon Mar 02 2020 03:47 PM
Joined: Sep 2013
Posts: 1,008
M
Shop Shark
Ed, I just discovered my pilot light issue was partially a grounding issue. While chasing down a brake light problem I re-cleaned the steering column under the Signal-Stat 900 flasher switch. I'd initially scraped the paint to provide a ground when I installed turn signals. After a quick sanding, the pilot light will flash a couple times then stop. Next step will be to remove the bulb and see if I can spot a contact/continuity issue.

Added in edit; this afternoon I pulled the top cover off the ol SignalStat 900 turn-signal switch, then pulled the pilot light bulb. All looked good, grounding it to a proven ground made no change. When the turn-signals are activated, the bulb will light up very brightly, flash a time or two, then dim and not flash. My current theory is it's all related to the fact that I'm running a old stock, flasher unit. With LED's in the rear and stock incandescent bulbs up front, the flasher isn't seeing sufficient load to operate the pilot bulb. A weak theory I know. The test would be to reinstall the incandescent bulbs in the rear and see what happens. If I do, I'll report the results. The problem is, if the test causes the pilot to work, I'm not sure what good that is since I don't know how to fix the problem. A digital or electronic flasher unit ? When I've tried those in the past, the turnsignals flashed unacceptably fast.

Good Luck,

RonR

Last edited by moparguy; Tue Mar 03 2020 02:14 AM.

1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1951 Farmall Super A



Re: Flasher pilot light fails
Forty9 #1348977 Fri Mar 06 2020 03:37 AM
Joined: Jan 2010
Posts: 4,510
D
Shop Shark
I run standards in front. And LED’s in rear

Standard flasher works for me
Im 12 volts. I think OP is 6 volts

My pilot works ok with this set up


My problem was not being able to hear the clicker and the bar of steering wheel blocking pilot

..my fix...

Re: Flasher pilot light fails
Forty9 #1349000 Fri Mar 06 2020 12:24 PM
Joined: Sep 2013
Posts: 1,008
M
Shop Shark
DADS50, Nice! Yes on OP (and my truck) being 6V. Should this be a problem? My truck with alternator has about 7.5V when running.


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1951 Farmall Super A



Re: Flasher pilot light fails
Forty9 #1349003 Fri Mar 06 2020 01:02 PM
Joined: Sep 2001
Posts: 29,852
ace skiver


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE [1954advance-design.com] - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Flasher pilot light fails
Forty9 #1349263 Sun Mar 08 2020 05:24 PM
Joined: Apr 2008
Posts: 779
F
Forty9 Offline OP
Shop Shark
The LEDlights flasher range is 5-7V according to their customer rep. I think my problem is same as moparguy since my alternator also puts out 7.5V. Resigned myself to no pilot light since the flashers do work and click.


Ed

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