2006 Mustang GT electrical problems - Ford Mustang Forum
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post #1 of 5 (permalink) Old 12-14-2019 Thread Starter
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Question 2006 Mustang GT electrical problems

Now that it is getting colder out,I live in MA. At times when I go to start it the battery seems dead and I have to jump it.The battery is only a year old. Then it started to have other glitches such as it will start but just barely and it resets the radio and clock,The other day after driving it for awhile I stopped at a store and when I started it the fuel gauge went to E when it was full and I got some kind of fuel error message after a few seconds the gauge went back to normal and the error message went off. This morning it barely started and it took a few seconds when I turned on the headlights for my dash lights to come on and same thing with the radio.

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post #2 of 5 (permalink) Old 12-14-2019
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Try cleaning your battery cable lugs and battery terminals with a battery brush.

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post #3 of 5 (permalink) Old 12-14-2019
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Originally Posted by 07redstang View Post
Try cleaning your battery cable lugs and battery terminals with a battery brush.

2006 GT Deluxe - 5MT - 12.50 @ 109.61
314rwhp 330rwtq with basic bolt-ons
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post #4 of 5 (permalink) Old 12-14-2019
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Did you have the alternator checked, to make sure it is charging the battery?
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2006 GT, Strut Tower Brace, Gas Hood Struts, FR Intake Plenum cover, Metal Fuse Box cover, Moroso brake reservoir cover, Rear shock tower brace, Front Bumper Lip Spoiler, JVC DVD Head unit w/ back-up camera, satellite Radio and USB input, 2 - 12" sub-woofers, 4 - 6"x8" speakers, 2 - 6.5" speakers to replace the door subs, 3 amplifiers, LED lights under the hood and in the trunk, chrome e-handle on parking brake handle, chrome cup holder trim, and trunk lid cover with running pony emblem.

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post #5 of 5 (permalink) Old 12-15-2019
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Also check for water intrusion and corrosion of the Smart Junction Box located in the passenger foot well. If the SJB has corrosion it will cause all sorts of electrical gremlins. Do a quick search on the forums to find out what and how to check. I had my '06 GT for 9yrs and went to the store one day and when I got out the radio wouldn't turn off when the door opened. Thought it was just a computer/relay glitch so I turned it off at the radio. Forgot about it when I got back home, went out the next morning and the battery was drained even though the head unit was off. Turns out the amps were still powered up.

2006 GT- Airaid Race CAI, 62mm BBK TB, SR Performance UD Pullies, FRPP Hot Rod Cams, CMDP's, Excedy Stage One Clutch and lightweight flywheel, Pacesetter Long Tube Headers with matching O/R H-Pipe & MBRP Street Axlebacks, Lito 91 Octane Tune
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