For cars, RVs and motorcycles, the most common symptom of a bad wiring harness is a dead battery or one which looses charge very quickly and frequently. Another is when the engine either revs up or idles down unexpectedly, or the vehicle lurches / stutters when driving.Click to see full answer. Also question is, what causes a wiring harness to go bad?If the machine isn’t properly maintained or adjusted, user error can cause mistakes, including improper wire layout, poor connection to the harness chassis, or inexact measurements that prevent the entire wiring harness from fitting correctly inside the application.Also, how long does it take to replace a wiring harness? If the wiring harness in question is located in a tough-to-reach area, the technician may need to disassemble parts of the vehicle to gain access. In other words, installing a wiring harness could take as little as an hour, as long as 20 hours, or longer if complications arise. Similarly, you may ask, can a wiring harness go bad? The entire wiring harness could not have gone bad unless you had a massive short circuit and fried all your wires. Replacing the entire wiring harness is a big job since everything needs to be unplugged, parts need to be taken out, and assembled back together.How much does it cost to replace a wiring harness?Cost of a used harness was $425 and then labor cost $1300 total cost $1725. Service MGR said the air conditioner would have to be taken apart and then recharged, dash board dropped, and another section of the engine taken off to install the entire wiring harness.
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