Electrical Turn Signals – Common Problems and Repairs – 2.5L NA Estimated reading: 3 minutes Contributors Overview This guide addresses common turn signal issues on the Porsche 944 (8-valve engine) for models from 1983 to 1988, specifically when the turn signal blinks faster on one side or lights up but does not blink. These problems are often caused by dirty bulb contacts, a bad bulb, or a faulty flasher relay. Proper diagnosis and repair ensure safe and reliable turn signal operation, critical for road safety. Pink and blue text represent links to additional resources, tools, parts, and partner websites. Tools Required Wire brush Emery cloth or fine sandpaper Flathead screwdriver (for accessing bulb sockets) Dielectric grease applicator or small brush Parts Required Turn signal bulb (if replacement is needed) – 900 631 127 90 Flasher relay (if replacement is needed) – 944 615 115 00 Dielectric grease (small tube) Step-by-Step Procedure Step 1: Diagnose the Turn Signal Issue Turn on the ignition and activate the turn signal on the affected side. Observe the behavior:If the turn signal blinks faster on one side: Proceed to Step 2 to clean the bulb sockets and contacts. If the turn signal lights up but does not blink on one side: Proceed to Step 3 to check for a bad bulb. If the turn signal lights up but does not blink on both sides: Proceed to Step 4 to replace the flasher relay. Step 2: Clean Bulb Sockets and Contacts Locate the turn signal bulb on the side blinking rapidly (front or rear, as applicable). Use a flathead screwdriver to carefully remove the lens cover or access panel to reach the bulb socket. Remove the turn signal bulb by twisting the socket counterclockwise and pulling it out. Clean the bulb socket with a wire brush to remove dirt, corrosion, or debris. Inspect the bulb contacts and clean them with emery cloth or fine sandpaper until shiny. Apply a thin layer of dielectric grease to the bulb contacts using an applicator or small brush. Reinstall the bulb by inserting it into the socket and twisting clockwise to lock. Test the turn signal to confirm it blinks at the normal rate. If the issue persists, proceed to Step 3 to check the bulb. Step 3: Check and Replace Bad Bulb Remove the turn signal bulb on the affected side (as described in Step 2). Inspect the bulb for a broken filament (visible as a disconnected or burnt wire inside the bulb). If the filament is broken, replace the bulb with a new turn signal bulb (900 631 127 90). Reinstall the bulb and test the turn signal to confirm it blinks correctly. If the issue persists or if the bulb is not broken, proceed to Step 4 to check the flasher relay. Step 4: Replace Flasher Relay Locate the flasher relay, typically found in the fuse box under the dashboard on the driver’s side. Remove the old flasher relay by pulling it straight out of its socket. Install a new flasher relay (944 615 115 00) by pushing it firmly into the socket. Test both turn signals to confirm they blink correctly on both sides. Post Procedure Checklist Verify that the turn signals blink at the normal rate on both sides. Ensure the lens covers or access panels are securely reinstalled. Check that no warning lights appear on the dashboard related to the turn signals. Drive the vehicle 1 mile (1.6 km) to confirm consistent turn signal operation under normal conditions. Sources Clark’s Garage Pelican Parts Porsche 944 Workshop Manuals YouTube Tagged:ElectricalTurn Signals Turn Signals – Common Problems and Repairs – 2.5L NA - PreviousStarter Removal and Installation – 2.5L NANext - Turn Signals – Common Problems and Repairs – 2.5L NAClock and Temperature Controls Removal and Replacement – 2.5L NA
