Intermittent starting issues can certainly be frustrating and can lead to fear of being stranded. SureTrack community member grizz81 had a RAM 1500 pickup in their shop that would randomly be hard to start or would start cranking then stop. They posed the question to the community, and with the help of fellow community member Jamesbellam and others, they were able to resolve the issue quickly.
The following Community Fix summarizes the interaction between members of the community that led to the solution.
Vehicle
2012 RAM Pickup 1500 5.7L
Title
Intermittent no start, replaced battery cables.
Complaint
Customer states that truck will not start intermittently.
Diagnostic Steps Performed/Parts Replaced Starter will engage for split second, click and then nothing Happens randomly and if you then turn key 3 times to click starter, the truck starts. Monitored voltage at relay and found when condition happens no voltage at PCM terminal on relay to turn on starter. TIPM data says vehicle is not requesting crank. Went to PCM data and found the same, ignition switch crank signal not present. Previous shop replaced ignition switch and starter with OE parts from Chrysler. Truck can go a week with no issue and then act up. Again 3 attempts with click only, then cranks and starts. No data or memory losses in vehicle. All instrument panel lamps stay illuminated and no systems have codes. Has had new node module and starter replaced. Also previous TIPM replaced for other concerns. Looking for some help, possible bad switch? This is very intermittent but when it happens always takes 3 turns to crank position to engage starter.
Best Answer from Community Member Jamesbellam You may want to perform voltage drop on both battery cables. Sometimes internal corrosion cannot be seen but when tested found resistance to be to high.
Cause
Performed voltage drop test on battery cables and found both of them to have high resistance indicating corrosion issue.
Correction
Replaced battery cables, cleaned battery terminals. Truck now starts consistently.