Automotive

In addition to ignition, power and monitoring gauges and lights, today's motor vehicles feature computerized engines, transmissions and braking systems, electronic mapping systems, Bluetooth and Internet connectivity, sensors that detect other vehicles, motorized seats, and digital audio and video systems; several manufacturers are producing electric and hybrid automobiles and self-driving cars.

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I was trying to figure out why my 1986 F150 wasn't holding charge and found out it was the battery. I had pulled the alternator and battery off to have them tested. While reinstalling the alternator I touched a hot wire to the frame and now it won't crank. When I turn the key I no longer hear the file pump or anything under the hood turn on. It will turn over but not fire. Any help would be appreciated.
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Lights show on dashboard Battery terminals a bit loose got jump start won't go. While getting towed in neutral it just started. Mitsubishi diamante 95. Ifor not battery can u tell me other possibilities
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Attached is data dump of some example symbol "ast".  This symbol starts at address 0x0000 6814.

What is oriented display and what is line break at 2 power x ?
Orient-Display.PNG
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hi Folks

i have been stuck on this issue for days and found no clue to fix it.

the navigation unit of my Toyota Prius makes some kind of clicking noise when it is powered on, finally i have figured out that the noise is related to its maps DVD. once the DVD disc is removed, the noise disappears. initially i thought it was caused by an aged DVD disc as the disc was used in the unit for years. i thought a new backup disc could fix the issue, but I was wrong.

now, all DVD discs can't be recognised by the navigation unit, whatever they are original copy, or burned backup discs in DVD -R, +R or RW, speed 1x or 16x, the same message keeps showing on the unit's screen. all discs can be loaded, but nothing works at all.

how can i fix the issue?

the car is out of manufacturer warranty, i am thinking if it is feasible to remove the navigation unit and clean it myself. If yes, how?

thanks heaps in advance,

bbao
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Automotive

In addition to ignition, power and monitoring gauges and lights, today's motor vehicles feature computerized engines, transmissions and braking systems, electronic mapping systems, Bluetooth and Internet connectivity, sensors that detect other vehicles, motorized seats, and digital audio and video systems; several manufacturers are producing electric and hybrid automobiles and self-driving cars.