Where is the turn signal relay on a 2008 Dodge Ram 1500?
On a 2008 Dodge Ram 1500, the turn signal relay is typically located in the fuse/relay box on the driver’s side under the dash; some configurations may route signals through the engine bay’s power distribution center or rely on the body control module. The exact location depends on trim and production date, so check the fuse box diagram for the precise relay label.
Where you’ll commonly find it
Many Rams place the turn signal flasher in one of two places. Knowing both helps you locate it quickly when troubleshooting a blinking issue or a non-working turn signal.
- Under-dash fuse/relay block on the driver’s side (behind the kneepad or kick panel). Look for a relay labeled Turn Signal, Flasher, TS, or SIG.
- Engine bay power distribution center (PDC) near the firewall or along the engine bay. The lid diagram will indicate a TS/Flasher relay if this is the location.
- In some configurations, the turn signals are controlled by the body control module (BCM) rather than a separate mechanical flasher relay. If you don’t find a dedicated flasher relay, this is likely the case.
Bottom line: Always refer to the fuse box cover diagram and the owner's manual to confirm the exact relay placement on your specific vehicle.
How to identify and test the relay you find
Use these practical steps to pinpoint the correct relay and determine if it’s failing. The Ram’s layout can vary, so approach each location methodically.
Under-dash fuse/relay block (driver’s side)
Remove the cover from the under-dash fuse block and scan the relays for one labeled Turn Signal, Flasher, TS, or SIG. If unsure, swap it with a similar 5-pin or 4-pin relay (same amperage) from another circuit, then test the turn signals. If they start flashing correctly after swapping, the original relay is bad.
Engine bay power distribution center (PDC)
Open the PDC cover and locate the relay labeled for the Turn Signal or Flasher. The process is the same: swap with a like relay to test. If the turn signals improve, you’ve identified the faulty relay or the labeling confirms the correct part. If you still have issues, the BCM or wiring may be at fault and require professional diagnosis.
Note: In some 2008 Rams, the BCM handles turn signals, so symptoms may persist even with a good relay. A diagnostic scan or professional inspection may be required in such cases.
Summary
For a 2008 Dodge Ram 1500, start by checking the driver’s-side under-dash fuse/relay block for a flasher relay labeled Turn Signal, Flasher, TS, or SIG. If it isn’t there, inspect the engine bay Power Distribution Center and look for the same label. Be aware that some late-2000s Rams rely on the body control module to handle turn signals, which means no separate relay may be present. Always consult the fuse box diagram and the service manual for your exact VIN-level configuration.
