Short to Ground
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Senior User
Joined: Jun 2018
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From: Northern Colorado
Short to Ground
So my blinker is going a bit fast, and the dash indicator is dim. It's also dimmer on the driver's side. I'm assuming this is all due to a short somewhere, but wanted some advice on best methods to chase it down.
Thanks
Thanks
FTE Legend
Joined: Nov 2015
Posts: 30,906
Likes: 4,122
From: Angier, NC
Ok my take on this, if it was a short the fuse would blow or wires would burn up.
Try easy things first like change all the bulbs.
Then the flasher as a bad flasher could also do that.
Dave - - - -
Try easy things first like change all the bulbs.
Then the flasher as a bad flasher could also do that.
Dave - - - -
Fleet Mechanic
Joined: Aug 2016
Posts: 1,480
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From: Great White North
More modern vehicles from the 70's and 80's that have the issue you are describing is due to a bulb being burned out. It may be a dual filiment bulb such as the brake/turn signal/ taillight.
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
Most times when folks talk about a short in the wiring what's probably happening are corroded, loose, or missing ground path(s). The frame itself is used for the return path for turn signal markers and the headlights and the radiator support. With these old trucks you'll have to spend some time replacing the cables and getting every connection clean, bright, and tight or the voltage drop will be significant, and weird stuff starts happening because the device drawing current will pull it through something or somewhere else. Also pay particular attention to the main harness connectors through the firewall.
Fleet Mechanic
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Joined: Jun 2018
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From: Northern Colorado
I ended up pulling the flasher assemblies (front) and found some pretty corroded wire "connections" <---- Barely distinguishable as "connections" lol. With a bit of cleaning/stripping and some solder, the wires have been shrink wrapped and repaired. The result was marvelous until the fuse blew out. At that point I figured I should pull the back indicators/flashers and have a look... good thing I did because there were 3rd wires added to each pigtail and the ends were loose. I guess one touch to ground would put those out of commission quick. Surprised it hadn't happened sooner.
Thanks for the advice all.
Thanks for the advice all.
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