How do turn signals work?

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(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, from the column plug. Using your voltmeter set to the above parameters, selects a side and measures the wire from the plug. It should show 12 volts (solid or intermittent), If not, you have a switch / harness failure. Inspect, and repair or replace as required.
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#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.
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#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.
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#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).
  
If you have 12 volts, trace the harness rearward (or forward) until it comes to a plug. Inspect the harness for cut or burned condition as you go. Repair or replace as needed. If good inspect the plug (s) for clean proper mating pins, and burned wires. If good,
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===Left or right side turn signals dead===
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Follow the same procedure as outlined for front or rear dead above. However, apply it to the affected side.
  
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)
 
  
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===All rear turn signals flashing===
EITHER SIDE DEAD (front & Rear):
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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.
  
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==Notes==
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The procedures above will cover most of the basic and common problems found in the turn signal system.
  
Follow the same procedure as outlined for Front or rear dead above, EXCEPT apply it to the affected side.
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Tools and materials needed:
 
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*Digital Volt-Ohm Meter
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*Jumper wire set
ALL REARS FLASHING:
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*An accurate diagram
 
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*Contact cleaner
 
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*Acid brush
Inspect the turn signal switch for a short between the brake lamp circuit and the signal circuit. Check the Column Plug / 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 / harness and repair or replace as needed.
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*Standard hand tools
 
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*Dental pick
This will cover MOST of the BASIC & common Problems found in the signal system...
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*Emory cloth
 
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*Miscellaneous hardware
Tools needed: DVOM, Jumper wire set, A Good diagram, Contact cleaner, Acid Brush, Standard hand tools, Dental Pick, Emory Cloth, Miss Hardware.
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--[[User:207.200.116.71|207.200.116.71]] 17:22, 10 September 2006 (PDT)
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Revision as of 12:00, 11 September 2006

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