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Help! High Beams don't work!

 
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Mustang Munkey



Joined: 28 Aug 2016
Posts: 34
Location: Yorktown, VA

PostPosted: Sat Apr 29, 2017 5:33 pm    Post subject: Help! High Beams don't work! Reply with quote

I have a 1989 ASC McLaren Mustang. I was driving the other night with my headlights on when I decided to switch to high beams. When I shifted the switch on the column to the high beam position I lost my headlights and my fog lights completely. When I shifted the switch back to low beams I got nothing but I wiggled the switch around and finally the low beams and fog lights came back on. Ever since I have low beams but no high beams. Has this happened to any of you and if so how did you fix it? Thank you, Mark
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1989 ASC McLaren Triple BLUE #128
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svo413



Joined: 29 Aug 2004
Posts: 677
Location: San Mateo, California

PostPosted: Sun Apr 30, 2017 4:11 am    Post subject: Switch Reply with quote

Sounds like to turn signal stalk switch went out. I'm not 100% sure. I never had this happen. Those switches have skyrocketed in price to $400. There are after market ones but often dont last.

FYI, the headlight switches are prone to failure too.
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Kevin Gold card MCA Judge for Fox Body
85 ASC Vert #612205
88 ASC Vert #542 20,550 miles
84 SVO 24,000 miles
03 Mach I 7,900 miles
89 LX Vert
14 CA Special
69 Mustang coupe
67 T-bird 47,000 miles
16 F250
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plumkrazy



Joined: 27 Jul 2005
Posts: 1062
Location: Ann Arbor Michigan

PostPosted: Mon May 01, 2017 11:21 am    Post subject: Reply with quote

Would start with the headlight switch. Very common problem that when using high beams that the lights go off. Also a easy to find part and cheap. Under $50 last time I needed one.
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Silver GP IV
Black w/ silver FP
Red with tan interior
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4-barrel Mike



Joined: 30 Jan 2016
Posts: 108
Location: Portland, OR

PostPosted: Tue May 02, 2017 11:44 pm    Post subject: Reply with quote

Repop: http://www.blueovalindustries.com/in4005.html

OEM: http://www.blueovalindustries.com/in3080.html

I would pull the multi-function switch and gently blow it out (20 psi or less) and reinstall. If that did nothing, I would get some electronic/switch cleaner/lubricant and liberally spritz the MF switch while working the switch to all positions. If that doesn't work, I would buy a new switch.

Mike
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1985 5.0 SC, white/blue, modded by POs (more mods coming)
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Mustang Munkey



Joined: 28 Aug 2016
Posts: 34
Location: Yorktown, VA

PostPosted: Sun May 21, 2017 12:17 am    Post subject: Thank You, It Worked! Reply with quote

It was the multifunction switch and was worn out. I ordered a new one and it was simple to replace. It took me very little time to do and I love having high beams again! Thank you for your input.
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1989 ASC McLaren Triple BLUE #128
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