Your car won't turn over, and the dashboard is lighting up like a Christmas tree with random warning lights. You might not think of the strut mounts first most people don't. But damaged strut mounts can pinch, stretch, or sever nearby wiring harnesses, which can trigger multiple dashboard warnings and even prevent your engine from starting. Knowing how to inspect the strut mounts in this situation can save you a costly tow bill and help you narrow down the real problem before you start replacing parts that aren't broken.

Why would a strut mount cause warning lights and a no-start condition?

The upper strut mount sits at the top of the strut assembly, bolted to the strut tower in your fender well. It does more than just absorb road impacts. Many vehicles route critical wiring near the strut mount area including wheel speed sensor harnesses, ABS wiring, and even engine ground straps. When a strut mount fails, the strut can shift or rotate in ways it shouldn't, pulling on or crushing these wires. That electrical disruption can send false signals to your car's computer, triggering ABS, traction control, check engine, and other warning lights. In severe cases, a damaged ground connection or shorted wire can prevent the engine from cranking or firing at all.

What tools do I need before starting the inspection?

Gather these items before you get under the hood:

• Flashlight or headlamp
• Jack and jack stands (or a vehicle lift if available)
• Wheel chocks
• Gloves and safety glasses
• Inspection mirror (a small telescoping one works well)
• Multimeter for checking wiring continuity and grounds
• Phone or camera to document what you find

Never rely on a jack alone. Always secure the vehicle on jack stands before crawling underneath or reaching into the wheel well.

Step 1: Do a visual check of the dashboard and record the warning lights

Before touching anything, turn the key to the "on" position (without cranking) and take a photo of every warning light that appears. Write down the exact lights ABS, traction control, check engine, battery, oil pressure, airbag, and any others. This snapshot matters because it tells you which circuits are affected. If you see a cluster of unrelated lights, that usually points to a shared ground or a wiring issue rather than separate component failures. This pattern is a common sign when strut mount damage has disrupted wiring nearby.

Step 2: Pop the hood and inspect the upper strut mounts from above

Open the hood and locate the strut towers they're the raised metal domes on both sides of the engine bay, usually near the firewall. Look at the top of each strut mount. You're checking for:

• Rust or corrosion around the mount bolts and bearing plate
• Cracked or missing rubber in the mount itself
• Visible wiring that looks pinched, chafed, or melted against the mount
• Oil or fluid residue near the mount, which could indicate a leaking strut that's contaminated nearby connectors
• Misalignment if the mount looks tilted or the center stud is off-center, the bearing inside may have collapsed

Use your flashlight and inspection mirror to see around the mount from different angles. Pay close attention to any wire loom or connector that runs within a few inches of the mount.

Step 3: Check the wiring harnesses running near the strut assembly

This step is where many people miss the connection between suspension damage and electrical problems. Trace the wiring harnesses on both sides of the vehicle that pass near the strut tower and down through the wheel well. Look for:

• Frayed or exposed wire insulation especially where wires touch the strut body or mount bracket
• Disconnected or loose connectors a broken mount can tug on connectors until they pull free
• Melted wire sheathing heat from a binding strut bearing can damage nearby wiring
• Broken ground wires many vehicles ground major systems through bolts near the strut tower; a corroded or broken ground here can cause cascading electrical faults

If you find damaged wiring, don't repair it yet. Document it and continue your inspection so you understand the full picture before making fixes.

Step 4: Raise the vehicle and inspect the strut mount from the wheel well

Chock the rear wheels, jack up the front of the vehicle (or the relevant end), and place it securely on jack stands. Remove the wheel. Now you have a clear view of the strut assembly from below. Check the following:

1. Mount-to-tower bolts: Are they tight? Loose bolts let the entire strut shift and damage wiring.
2. Strut bearing condition: Try to rotate the mount plate by hand (carefully). It should move smoothly with the steering. Grinding, popping, or complete resistance means the bearing is failing.
3. Spring seat alignment: Look at where the coil spring meets the mount. If the spring has shifted off its seat, the mount rubber has likely collapsed.
4. Absorber rod condition: Look at the shiny rod coming out of the top of the strut. Pitting, scoring, or oil on the rod means the strut itself is leaking and may have contaminated the mount area.

Step 5: Test for electrical continuity on affected circuits

Using your multimeter, check the circuits associated with the warning lights you recorded in Step 1. Common checks include:

• Wheel speed sensor resistance: Compare readings on both sides. A significant difference or an open circuit (OL reading) on one side could mean the wiring was damaged by strut movement.
• Ground continuity: Test between the battery negative terminal and known ground points near the strut tower. High resistance or no continuity confirms a broken ground.
• ABS module connector: Unplug and inspect the connector for corrosion or bent pins, especially if the harness routes near the strut.

If you're not comfortable with a multimeter, a basic electrical troubleshooting guide can walk you through continuity testing.

Step 6: Inspect the strut mount on the other side for comparison

Always check both sides. If one mount has failed, the other may be close behind especially if both have similar mileage and wear. Comparing the two also helps you spot what "normal" looks like versus what's damaged. A collapsed mount on one side will look noticeably different from a healthy one in terms of rubber condition, bolt position, and bearing movement.

What are the most common mistakes people make during this inspection?

• Skipping the electrical check: Many people inspect the strut mount mechanically but forget to look at the wiring nearby. The mount itself might look okay, but the wiring it damaged is the real problem.
• Not securing the vehicle properly: Working under a car supported only by a jack is dangerous. Always use jack stands on level ground.
• Replacing the mount without fixing the wiring: A new strut mount won't clear your warning lights if the harness is still broken or disconnected.
• Ignoring the other side: Strut mounts wear in pairs. Replacing one and ignoring the other often leads to repeat problems within months.
• Not documenting warning lights before disconnecting the battery: Once you disconnect power, stored codes may clear. Record everything first.

Can I drive the car to a shop if I find a bad strut mount?

It depends on what you find. If the mount is mechanically loose and the wiring is intact, you can drive slowly and carefully to a nearby shop. But if you see exposed, damaged, or shorted wires especially near the ABS harness or a ground strap driving could cause further electrical damage or leave you stranded. In that case, towing is the safer option.

Quick-reference inspection checklist

Use this checklist to make sure you cover every step:

1. Record all warning lights with photos and notes
2. Inspect upper strut mounts from under the hood
3. Check wiring harnesses for fraying, pinching, or disconnection
4. Look for broken or corroded ground connections near the strut tower
5. Remove the wheel and inspect the mount from below
6. Test mount bearing movement and spring seat alignment
7. Use a multimeter to check speed sensor and ground circuits
8. Compare both sides of the vehicle
9. Document all findings before making any repairs

Tip: If your inspection confirms strut mount damage but you're unsure whether the wiring is the cause of the no-start condition, try temporarily repairing or bypassing the damaged wire (if safe to do so) and see if the engine cranks. This quick test can confirm whether the suspension damage is directly tied to your starting problem before you invest in a full strut replacement. If the engine still won't turn over after addressing obvious wiring damage, the issue likely extends beyond the strut mount area and you should check your starter circuit, battery connections, and ignition system next.