Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis & Testing: INTERMITTENTS
Most intermittent problems are caused by faulty electrical connections or wiring; however, a sticking relay or solenoid can cause a failure.
When intermittent failure is encountered, check for fault messages stored in CAB. If fault messages are found, inspect related components and circuitry for poor connections. If no trouble codes are found, inspect suspect circuits as follows:
- Check for poor mating of connector halves, or terminals not fully seated in connector body (backed-out).
- Check for improperly formed or damaged terminals. Carefully reform all connector terminals of problem circuit to increase contact tension.
- Check for poor terminal-to-wire connection.
- Check for hydraulic system leaks.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.