Turn signal electrical issue 1970 Mach 1
#1
Hi there. I've been troubleshooting an issue where the left turn signal stops working and is permanently lit in front left park and hood light  with no flashing. I've narrowed it down to the following issue but haven't figured out where to go next.


  1. Without the park lights on, both filaments in the front left park light are energized when turn signal is engaged and stray voltage is causing right park light to energize and flash albeit at a lower power level over the park wire. 

  2. With the park lights on, both filaments in the front left park light are energized along with the left hood lamp indicator but the turn signal is in the neutral position. Left turn signal does not work at TS switch.

  3. I confirmed that my park wire is energized and flickering voltage to the right park light when the left TS switch is activated. 

  4. Not yet sure if related but the low/high beam floor switch doesn't seem to be working and I have not yet chased those wires.
My take is somewhere from the TS switch forward voltage is leaking across the park and turn signal wires on the left side, just not entirely sure where that is yet. My next spot to check is the plug from the loom to the light by bypassing it completely, which the PO did on the other side. Anywhere else I should look to where the TS wires and park wires come in close contact?


Thanks
Reply
#2
Maybe some info in this thread  https://mach1club.com/showthread.php?tid=7907
Reply
#3
(10-21-2021, 07:11 PM)Oztrailer Wrote: Maybe some info in this thread  https://mach1club.com/showthread.php?tid=7907
Thanks for passing that along. My left side marker light doesn't work so I'm wondering if that is where the two lines are grounded/shorting. I didn't want to do it but I'm going to clip the wires to the side marker and front left park light to see if the issue stops. I'll know because my hood indicator light which is further up stream on the loom lights up solid when the park lights are on. That will at least let me know if those assemblies are the root cause.  

Cheers
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  72 Mach 1 Power Steering Pressure Hose Jelly 1 302 11-07-2021, 08:42 AM
Last Post: JTS71 Mach1
  Sequential tail light issue. 390mach1 6 1,802 05-23-2021, 10:28 AM
Last Post: JTS71 Mach1
  '03 Mach 1 fuel pump skidmarky 1 1,246 04-29-2021, 11:06 PM
Last Post: JTS71 Mach1
  Another issue come up ProblemChild54 2 3,968 03-11-2020, 12:01 AM
Last Post: Mister 4x4
  69 Mach 1 rear seat install RostaRob 8 13,669 06-29-2019, 02:44 AM
Last Post: rindel
  trouble with the hood mounted turn signal goldmach1 13 17,281 09-27-2018, 08:12 AM
Last Post: goldmach1
  How much of your Mach 1 have you replaced? Mister 4x4 8 13,781 07-13-2018, 08:45 AM
Last Post: Steven Harris
  1970 Mach 1 Hood tach rlincoln0814 15 22,521 03-08-2018, 03:53 AM
Last Post: 1969_Mach1
  69 MACH 1 fuel cap? noroz 6 16,990 06-06-2015, 03:51 AM
Last Post: 1969_Mach1
  04 Mach 1 exhaust rattle Bogie#7 11 24,748 05-30-2015, 05:47 PM
Last Post: 1969_Mach1

Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Latest Threads
Major Winter projects
Last Post: Limeyboy
Yesterday 06:05 PM
» Replies: 2
» Views: 167
Getting My 69 Mach 1 put back together.
Last Post: JTS71 Mach1
Yesterday 09:06 AM
» Replies: 9
» Views: 2787
Oil / water sensors
Last Post: Limeyboy
11-27-2021 02:35 AM
» Replies: 0
» Views: 37
Happy Thanks Giving!!!
Last Post: bob.harlan
11-27-2021 12:51 AM
» Replies: 1
» Views: 49
Cowl, Fender Apron, Radiator Support - W...
Last Post: JTS71 Mach1
11-25-2021 02:20 AM
» Replies: 9
» Views: 358
1970 Mustang TA black knit vinyl decor b...
Last Post: Tim
11-22-2021 03:52 AM
» Replies: 0
» Views: 94
PICTURE POSTING FOR NEWBIES!!
Last Post: Craig Pittman
11-20-2021 07:26 PM
» Replies: 8
» Views: 64973
WTB: 03/04 Azure Blue Mach 1
Last Post: Craig Pittman
11-20-2021 07:08 PM
» Replies: 3
» Views: 353
Fuel Issue
Last Post: JTS71 Mach1
11-10-2021 02:16 PM
» Replies: 9
» Views: 919
1970 Sportsroof, 351C, Shaker and more
Last Post: JTS71 Mach1
11-09-2021 11:39 PM
» Replies: 7
» Views: 659
71 Mach 1 - Wiring Harness
Last Post: JTS71 Mach1
11-08-2021 09:42 AM
» Replies: 1
» Views: 257
72 Mach 1 Power Steering Pressure Hose
Last Post: JTS71 Mach1
11-07-2021 08:42 AM
» Replies: 1
» Views: 302
MAch 1 ordered May 8 2021, Still waiting...
Last Post: JTS71 Mach1
11-02-2021 12:50 PM
» Replies: 3
» Views: 781
At What Price Do You Start Worrying Abou...
Last Post: Limeyboy
10-30-2021 06:37 PM
» Replies: 28
» Views: 47551
428 CJ headers
Last Post: JTS71 Mach1
10-24-2021 10:59 AM
» Replies: 3
» Views: 418
Happy birthday Steven Harris
Last Post: JTS71 Mach1
10-22-2021 11:14 AM
» Replies: 23
» Views: 36092
Turn signal electrical issue 1970 Mach 1
Last Post: flananuts
10-21-2021 09:01 PM
» Replies: 2
» Views: 366
Dome light wiring
Last Post: JTS71 Mach1
10-19-2021 12:53 PM
» Replies: 1
» Views: 305
A/C not blowing
Last Post: Limeyboy
10-13-2021 07:09 PM
» Replies: 0
» Views: 325
Blinkers on solid
Last Post: Limeyboy
10-13-2021 07:30 AM
» Replies: 13
» Views: 1346

>