Remove the fuse, using needle-nosed pliers if you have a hard time gripping it with your hands. The turn signal switch is the switch which activates the flasher on your turn signal when you move it in either an up or down direction. The turn signal switch performs several functions, both electrical, and mechanical, while indicating a vehicle turn. Listen to hear the flasher click. Use the adjustable wrench to disconnect the negative battery cable from the negative battery terminal post. The turn signal switch is the switch which activates the flasher on your turn signal when you move it in either an up or down direction. How To Test The Turn Signal Switch (Step by Step). Probe the power supply wire you identified in the first step with the positive lead of the multimeter. Just find it on the internet. Disclaimer. A wire runs from the flasher relay to the turn signal switch and another from the brake light switch to the turn signal switch. Once this voltage is received (and the Hazard Switch is in the OFF position), the turn signal switch re-routes battery voltage to the turn signal flasher (we'll test this in TEST 2). It can also be very helpful to double check your work when doing an extensive wiring procedure such as internally wiring handlebars , replacing a main harness, or simply changing signal light housings. Remove the flasher unit from the socket. All Rights Reserved. Go to: TEST 2. You'll need to disconnect the turn signal switch's connectors to identify the wires you need to test. To test with a test light, turn on the turn signals (and turn the key on so they work) and indicate a left turn. This is a really easy way to check why your motorcycle turn signals aren’t flashing. If it does not click, test it again using the horizontal prong and the other vertical prong. Determine how, according to the owner's manual, to access the in-dash lightbulbs if the turn signal does not display in the dash. To perform these troubleshooting steps, you'll need your vehicle's owner's manual, which contains schematics for the electrical components of the turn signal. Unscrew the bulb and replace it. My wiring was in good shape. Identify which turn signal bulb is not working. Turn the switch lever on and off. Once known as a turn signal or blinker switch, this … IMPORTANT: If you haven't already disabled the air bag system, do so now. Chrysler  |   Test the switch for continuity If the light only illuminates on one terminal, the switch is faulty and should be adjusted or replaced. 460 (yellow) from the headlight switch to the connector, where it attaches to wire no. C. Turn the ignition switch ON. For most trailers, turn signal lights, and brake lights are used together, so you would have four wires, for ground, running and park light, then the other two would be for brake and turning signal. American Autowire Universal and Classic Update Kit Bolt On Turn Signal Switch wiring instructions. C. Turn the ignition switch ON. Also in this location, you'll find the plugs that connect your tail lights and front turn signals to the car's electrical system. Test the turn signal switch itself. Your multimeter will register one of two things: battery voltage (10 to 12 Volts) or No voltage at all. The voltage is received on the circuit labeled with the number 2 of the Black turn signal switch connector. This is where a Wire Piercing Probe really comes in handy (To see what this tool looks like, click here: Ground the black multimeter test lead on a good Ground point. Click here to check prices on new & used Mercedes turn signal switches (eBay link). Unfortunately, the MFS has a fairly high failure rate. To get this show on the road, the first thing I'm gonna' ask you to do, is to verify that the turn signal switch is getting voltage from the turn signal fuse (this fuse is located in the instrument panel fuse box). Touch the probe of the test light to each of the switch terminals in turn. Attach the test lamp to a suitable earth and again hold the brake pedal down with the ignition on. Do NOT follow this link or you will be banned from the site! The tester should light up when the switch lever is in the ON position but should not light up when the switch … Test the Switch for Continuity . However, if they don't solve the problem, then you either have a bad flasher or a bad turn signal switch assembly. You turn the key and the engine doesn’t start, but you here one click coming from the engine when you turn the key. A. You could have a bad bulb in the turn signal or in the dash indicator. 3. Save money by doing the repair yourself—it's not as complicated as it looks. CASE 1: Battery voltage (10 to 12 Volts) was present- This is the normal and expected test result. Back probe the wire that supplies power to the switch; the test light should flash. Depending on the position of the turn-signal stalk, the power either stops in the switch or gets sent to the left or right turn-signal lights (including the indicator lights on the dashboard). Apply one test wire to the horizontal prong and one to a vertical prong. Turn signal switch sticks and the bar doesn't return to center position. Common Problems with the Multifunction Switch. You may need to remove a part or all of the vehicle's dashboard to access the bulbs. Unplug the flasher. Test the turn signal switch itself. Place a jumper wire from terminal #1 to terminal #3 on the socket itself. CASE 2: 12 Volts ARE NOT present in Circuit 2. With the signals off, the brake power goes straight thru the switch … Replacing a turn signal switch (often referred to as a “turn signal cam”) – where Chrysler routed the power to the brake lights by the way – is a time-consuming affair and a bit of a balancing act in certain places, but for me and likely, for many of you, is a mandatory one. See your vehicle's owner's manual if you need help unbolting the bulb assembly. Steering Column Wire Harness – Turn Signal Switch The multicolored wire harness on your Flaming River Industries steering column is for the turn signal switch pre-installed on the column. At the first step, you need to identify wires and the best way to access the signal switch electrical connector. Turn the Key On, since there's battery voltage only with the Key On position (also known as the RUN position). Power flows through the filament of the lights and then is grounded. Your purchase helps support my work in bringing you real diagnostic testing information to help you solve the problem! If the fuse is sound, look at the stalk and hazard-warning switches and the flasher unit. So the average car owner can troubleshoot these faults with the use of a test light and, sometimes, a digital multimeter (DMM). If not, go to Step 2. Turn the ignition switch to the On position. If the signal is flashing too quickly or too slowly, you may have the wrong type of bulb installed. Most vehicles with integral brake/turn use the turn signal switch to tell the bulb wether to be steady or blink. If you don't have a 12-volt power source or you are uncomfortable performing the test on your own, you can take the flasher to a local auto parts store and ask that the store test it for you. its easy! The circuit (wire) that sends this voltage to the flasher is the one that's labeled with the number 3 of the Black turn signal Connector. Or you could have a blown fuse. (It's easy!) If this does not resolve the problem, continue to Step 3. Troubleshooting how to test motorcycle turn signals. Make your own switch system. When you insert the probe into the yellow/black wire slot of the connector or green/white wire slot the test light should flash. Check that all the connections are sound and the wires unbroken. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Contour: How To: Turn Signal Switch and Flasher Repair/Replace. 1969 Plymouth GTX Turn Signal Switch Replacement. You probably have a bad starter motor. Turn … If you don't feel confident with electrical testing then find someone who is handy with electrical stuff or ask at the counter at the local parts store. If it does not click, replace the flasher. It will show you which wire should go where... Aftermarket switch CASE 1: 12 Volts are present in Circuit 2- So far so good. If your turn signal has stopped working, there are several possible reasons. This is a really easy way to check why your motorcycle turn signals aren’t flashing. If you have a wiring diagram, the turn signal wire is no. The turn signal switch is close to $100 new so you might want to have a shot at trying to determine if the problem is the switch assembly or the flasher. Change the turn signal bulb, using a replacement of the type listed in your owner's manual. ok put key in accy position. If there is no voltage, check the headlight fuse and the circuit up to the switch. Place a jumper wire from terminal #1 to terminal #3 on the socket itself. D. Move the turn signal switch in position to signal for a right turn. By following the troubleshooting tips below, you'll be able to determine and maybe fix the problem of your Saturn L300 turn signal switch before resulting to buying a replacement. If it does not click, test it again using the horizontal prong and the other vertical prong. The next step is to go to TEST 3. Your multimeter should register battery voltage (in the range of 10 to 12 Volts DC). Operate the switch to turn the left turn signal light. This document will provide a wiring diagram and a brief overview on how the turn signal switch functions. What you need to do is find the wiring diagram for the vehicle the column came from. In order to replace your bulbs, you had to access the back of the turn signal housings. The Black connector must remain connected to the instrument panel harness connector at all times during this test. Check the Connections. Terms of Use Turn the switch lever on and off. There are normally two on the driver's side and two on the passenger's side, at both the front and the back of the vehicle. For this test we use Fluke 87-V multimeter which we buy on Amazon.com 1. Your right, the switching contacts are in there, and the cancelling cam needs to be taken off, to get to them. Asta holds a Master of Public Administration with a concentration in nonprofit management and a Bachelor of Arts in English literature, both from the University of Georgia. (updated) You can’t replace the internal part, therefore, the whole turn signal switch needs to be replaced. If your turn signal switch is not working properly, you can save yourself some money by replacing it yourself rather than paying a mechanic to do it. If your multimeter still does not register battery voltage, then this tells one of three things: You'll need to troubleshoot and diagnose this missing voltage before continuing any further. Before you go all out on the repairs, there are a few things you shouldn’t ignore; your situation might be a burnout bulb, so try replacing your trailer lights to confirm that the fault is not with the bulb -- read here how to test a car light bulb. If it does not click, replace the flasher. You can follow the instructions above (check out the video) to easily see if the turn signals are faulty, or if you have a wiring issue you need to address. Remove the flasher unit from the socket. Test the Switch for Continuity . Power flows through the filament of the lights and then is grounded. 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