Which wires give constant, ignition and ground on a 2008 Volkswagen Jetta?
On a 2008 Volkswagen Jetta, take constant power from the Red/Yellow wire at the black 20-pin ignition harness plug, steering column, pin 19, ignition from the Black wire at the black 20-pin ignition harness plug, steering column, pin 17, and ground to clean, bare body metal. Meter every wire first.
Meter every wire before you tap it. Colors change with trim and build date.
OBD-II port:Under the dash, driver sideBest power spot:Ignition harness plugSystem voltage:12VIgnition type:Key start (this page)
Where do I get constant, ignition and ground on a 2008 Volkswagen Jetta?
Constant and ignition are on one plug at the key cylinder.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guide.
Where is the OBD-II port on a 2008 Volkswagen Jetta?
OBD II
Diagnostic portOBD-II port: under the dash, driver sidePlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Which years share wiring with the 2008 Volkswagen Jetta?
This page2008Volkswagen Jetta.
Same wiring2006, 2007, 2009, 2010Fortin uses the same guide for these years.
Newer Jetta2019 and newer2011 to 2018 not covered yet. Fortin splits those years by trim.
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This page covers the 2008 Volkswagen Jetta compact sedan with a key start.
The wire colors come from Fortin's install guide, read wire by wire. Our own team has not yet metered these on a 2008 Jetta.
Written by API Signal, fleet GPS and camera installers for 35+ years across Georgia, South Carolina and North Carolina, installing every major telematics and camera brand. Every wire on this page lists its source.
Test every wire with a meter before you tap it
No wiring information is ever guaranteed. Colors and locations change with trim, options and build date, and the manufacturer can change them in the middle of a model year. We share this as a starting point for installers, and you are responsible for confirming every connection on the vehicle in front of you.
Common questions about 2008 Volkswagen Jetta wiring
What wire is constant power on a 2008 Volkswagen Jetta?
Red/Yellow at the black 20-pin ignition harness plug, steering column, pin 19. 12V battery feed. Meter it before you tap it.
What wire is ignition on a 2008 Volkswagen Jetta?
Black at the black 20-pin ignition harness plug, steering column, pin 17. Hot with the key in run. Meter it before you tap it.
Which years share wiring with the 2008 Volkswagen Jetta?
2006, 2007, 2009, 2010. Fortin uses the same guide for these years.
Help build this page
Had the panels off on one of these? Show the next installer what you found.
No one has sent photos for the 2008 Volkswagen Jetta yet, so yours could be the first. Every photo, wire color and tip we use goes on this page with your name on it, and it saves the next installer time under the dash.
1. Snap it
The plugs, tap points, fuse boxes and ground points. Phone photos are fine.
2. Send it
Tap "Add yours" at the top of this page. Your tip and your photos go in the same box.
3. See your name on it
We check every tip, then post it here "Compliments of" you, by name.
Compliments of
The installers who helped build this page.
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Founding contributor spot: openThe first installer to confirm a wire or send photos for the 2008 Volkswagen Jetta gets their name here, and it stays here.
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Every tip we use gets a creditThe wire you checked is marked "Checked on a vehicle, compliments of" you.
Want to be famous?
Your name, right on this page, for everyone who uses it to see. Add your tip and your photos in one box.
