flickering instrument lights

Trey Ragsdale · 07-07-2001, 11:10 PM

Help! I own a '70 Mach I which until recently had no electronic circuit problems. The instrument and parking lights start flickering on and off after the headlights are turned on for a while. This seems to be temperature related because it does not happen until the engine bay and/or circuit heat up. Also, it happens much easier when the "sport lamps" are turned on. I appreciate any ideas or suggestions.

zach0 · 07-08-2001, 09:15 AM

It may be the headlight switch going bad.

------------------
66 Mustang Black W/ Black
289 Hi-Po 65'heads, MSD
Lunati High lift Cam
750CFM Carb Heddman Headers, Hurst Shifter

mustangII460 · 07-08-2001, 05:31 PM

I second the switch.

Gearhead999 · 07-08-2001, 06:24 PM

I'll third it, sure sounds like the switch.

Trey Ragsdale · 07-18-2001, 09:44 PM

Thanks for your replies, as they reinforced my initial guess.

Brian Browning · 07-19-2001, 09:29 AM

One of my budies just had a similar problem with his headlights. The wires that plugged into his voltage regulator were loose.

------------------
65 convertible
'66 289 Hi Po motor, 351 heads, headers, duals, shelby intake, petronix,
4 speed top loader, 389 rear, road demon

07-07-2001, 11:10 PM	#1
Trey Ragsdale Registered Member Join Date: Jan 2001 Location: Buda, Tx., US Posts: 15	flickering instrument lights Help! I own a '70 Mach I which until recently had no electronic circuit problems. The instrument and parking lights start flickering on and off after the headlights are turned on for a while. This seems to be temperature related because it does not happen until the engine bay and/or circuit heat up. Also, it happens much easier when the "sport lamps" are turned on. I appreciate any ideas or suggestions.

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07-08-2001, 09:15 AM	#2
zach0 Registered Member Join Date: Apr 2001 Location: Hampton, Virginia Posts: 227	It may be the headlight switch going bad. ------------------ 66 Mustang Black W/ Black 289 Hi-Po 65'heads, MSD Lunati High lift Cam 750CFM Carb Heddman Headers, Hurst Shifter

07-08-2001, 05:31 PM	#3
mustangII460 Factoy Five Roadster Join Date: May 2000 Location: Sevier Co,Tennessee Posts: 1,681	I second the switch.

07-08-2001, 06:24 PM	#4
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	I'll third it, sure sounds like the switch.

07-18-2001, 09:44 PM	#5
Trey Ragsdale Registered Member Join Date: Jan 2001 Location: Buda, Tx., US Posts: 15	Thanks for your replies, as they reinforced my initial guess.

07-19-2001, 09:29 AM	#6
Brian Browning Registered Member Join Date: Sep 2000 Location: Hattiesburg, MS, USA Posts: 86	One of my budies just had a similar problem with his headlights. The wires that plugged into his voltage regulator were loose. ------------------ 65 convertible '66 289 Hi Po motor, 351 heads, headers, duals, shelby intake, petronix, 4 speed top loader, 389 rear, road demon