How do turn signals work?
(→Front signals work, but rear signals are dead (or vice-versa)) |
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===Front signals work, but rear signals are dead (or vice-versa)=== | ===Front signals work, but rear signals are dead (or vice-versa)=== | ||
| − | Isolate the two wires the effected end | + | #Isolate the two wires on the effected end from the column plug. Using your voltmeter, set to the above parameters, select a side, and measure the wire from the plug. It should show 12 volts (solid or intermittent). If not, you have a switch or harness failure. Inspect, and repair or replace as required. |
| + | #If you have 12 volts, trace the harness rearward (or frontward) until it comes to a plug. Inspect the harness for cut or burned conditions as you go. Repair or replace as needed. If good, inspect the plug(s) for clean proper mating pins, and burned wires. | ||
| + | #If the plugs look good, go to the lamp buckets, and measure between the socket ground and a known good ground. If it shows 12 volts, you may have an open ground wire. Replace or install a ground from each socket to a hard frame ground, following proper bonding procedures (star washers and burnishing). | ||
| − | + | ===Left or right side turn signals dead=== | |
| + | Follow the same procedure as outlined for front or rear dead above. However, apply it to the affected side. | ||
| − | |||
| − | + | ===All rear turn signals flashing=== | |
| − | + | Inspect the turn signal switch for a short between the brake lamp circuit and the signal circuit. Check the column plug and harness for shorts. Ohm the harness out with no power on, but either side selected. You should have no reading from the selected side to the brake lamp circuit, and continuity in the "Off" position to the brake lamps. If not, inspect the switch and harness, and repair or replace as needed. | |
| + | ==Notes== | ||
| + | The procedures above will cover most of the basic and common problems found in the turn signal system. | ||
| − | + | Tools and materials needed: | |
| − | + | *Digital Volt-Ohm Meter | |
| − | - | + | *Jumper wire set |
| − | + | *An accurate diagram | |
| − | + | *Contact cleaner | |
| − | + | *Acid brush | |
| − | + | *Standard hand tools | |
| − | + | *Dental pick | |
| − | + | *Emory cloth | |
| − | + | *Miscellaneous hardware | |
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