Recently all electrical systems are being affected by turn signals, applying brakes...etc... I can see my voltage gauge pulsing to the clicking of turn signals....sometimes the radio is affected by wipers....please help.
Check your battery connections. Make sure they're clean and tight. Usually the symptoms your describing are caused by a bad ground. Either at the battery or one of the chassis grounds. Also a bad or weak battery could cause the same problems.
Follow the ground off the battery. Might wana get your alt checked. Thats what feeds the juice when the truck is on.
You have a common frame ground where the (-) battery cable attaches to the frame. This also provides the engine ground. I would remove this bolt and clean all metal surfaces with fine sandpaper. Be sure to clean the contact from the engine block to the (-) cable bolt also. You also have a ground wire running from the rear of the cylinder head to the firewall. On my truck it is black w/yellow stripe and is bolted to the speedometer cable support on the firewall. If that doesn't correct the problem, check for any ground wires under the dash. They will usually screw into the sheet metal.
