Complete Wiring Guide for 900 Series Turn Signal Switch Connections
For models with a three-terminal relay (common in early variants), connect pin 85 to the flasher unit output, pin 86 to ignition-switched 12V, and pin 30 to the left or right front/rear lamp cluster depending on the circuit. Use 18-gauge wire with crimped terminals; soldering introduces resistance and risks brittle connections under vibration. Verify continuity between the relay socket and bulb socket–corrosion at grounding points often mimics relay failure.
Trace the gray/red wire from the stalk assembly to the hazard module: if voltage drops below 11V at the module, replace the 15A fuse (labeled “SIG” in the fuse box) before assuming module failure. Disconnect the battery negative terminal before probing circuits–shorts through the steering column clockspring can blow the 30A main fuse. Test stalk resistance with a multimeter: 6Ω ±10% between L terminal and ground confirms functionality; deviations indicate internal switch wear.
Install a bidirectional diode across the flasher relay coil to suppress voltage spikes–use a 1N4007 for reliability. Route wires along existing loom pathways; secure with nylon ties every 15 cm to prevent chafing against the brake pedal linkage. If lamps flash erratically, inspect the brown/blue wire at the rear lamp assembly for partial breaks: wiggle-test while observing voltage (should remain steady at 12V). For vehicles equipped with fog lamps, the white/black wire carries the shared ground–ensure this isn’t shared with other high-drain circuits.
When replacing the multifunction unit, match the part number stamped on the plastic housing (typically 499 835 921 for pre-1998 builds). Remove the lower steering column cover first; pry the switch from the column using a flat-head screwdriver at the 6 o’clock position–lever gently to avoid cracking the mounting tabs. Reassembling requires alignment of the indexing pin with the column spline; misalignment causes uncommanded activation or flickering.
For aftermarket LED retrofits, bypass the flasher module with a solid-state relay (e.g., Hella 8RA 003 101-1)–OEM flashers are analog and incompatible with LED load requirements. Label each wire with masking tape before disconnection; color codes differ across model years (e.g., 1994 uses green/violet for right-turn feed, while 1997 uses green/orange). Final step: cycle the ignition and hazard functions five times–consistent flash rate (60±5 cycles/min) confirms correct installation.
SAAB Control Lever Circuit Reference: Key Connections
Locate the multi-pin connector behind the steering column shroud–pins 2 (L/H flasher), 5 (hazard relay feed), and 8 (brake cancel) require 1.0 mm² stranded copper wire with yellow insulation. Splice pin 2 to the relay socket terminal 30 using a Western Union knot; insulation resistance must exceed 1 MΩ at 500 VDC. Failure to maintain this resistance causes erratic pulse timing or intermittent dropout on the front gauge cluster.
Verify the ground path for the stalk assembly: the black-sheathed lead on pin 12 ties directly to chassis point G103 beneath the driver’s footwell. Remove any corrosion from G103 with 400-grit emery paper; apply dielectric grease before refastening. Insufficient grounding manifests as delayed indicator release–confirm proper operation by cycling the lever while monitoring voltage drop across G103 with a DMM set to 2 VDC range.
| Connector Terminal | Wire Color | Function | Voltage (KOEO) |
|---|---|---|---|
| 3 | Red/White stripe | Fused ignition feed | 12.4–14.2 V |
| 6 | Brown/Yellow stripe | Front right lamp output | Flashing 0–12 V |
| 9 | Blue | Hazard lamp override | 0 V (active low) |
Route the brown/violet striped lead from pin 4 to the central relay panel at slot C13; ensure no sharp bends tighter than 25 mm radius to prevent insulation fracture. Crimp connections with a ratcheting crimper using insulated female spade terminals; solder joints are unnecessary if crimp integrity exceeds 80 N tensile force. Use a torque screwdriver set to 1.2 Nm when securing relay retainers to prevent cracked mounting tabs.
Test the cancel cam microswitch by activating the lever and noting continuity between pins 7 and 10–resistance should toggle from infinite to 0 Ω within 15° of cam rotation. If readings deviate, disassemble the switch and clean the cam surfaces with isopropyl alcohol; avoid silicone lubricants as they attract dust and accelerate wear.
Direct Hookup Guide for Saab Lever Assembly
Disconnect the battery terminal first to prevent short circuits. Remove the steering column shroud by unscrewing the three 8mm bolts beneath the dash. The lever housing will expose a multi-pin connector–label each wire with masking tape before detachment.
- Locate harness pins numbered 1 through 6 on the vehicle-side plug.
- Pin 1: Green stripe wires to the front left bulb socket terminal.
- Pin 2: Solid green to the right front socket terminal.
- Pin 3: Yellow stripe to the rear left socket.
- Pin 4: Solid yellow to the right rear socket.
- Pin 5: Blue stripe–verify continuity with the instrument cluster flasher relay.
- Pin 6: Solid blue–connect to the hazard warning relay input.
Use a continuity tester to confirm each connection before soldering. Tin the wire ends with 60/40 rosin-core solder to prevent corrosion. Heat-shrink tubing over each joint must be sealed with a heat gun to maintain water resistance.
Reattach the lever housing using stainless steel bolts torqued to 6 Nm. Apply dielectric grease to the multi-pin connector before mating to avoid oxidation. Test the lever in both left and right positions–bulbs should blink at 60-120 cycles per minute.
If bulbs illuminate but do not flash, inspect the flasher relay located behind the fuse box. Replace the relay if clicking is absent during lever engagement. Verify the hazard warning function separately–all four bulbs must flash simultaneously.
Reinstall the shroud only after confirming all functions. Secure wiring with nylon ties to prevent contact with moving steering components. Reconnect the battery terminal last–ensure the ignition is off during reconnection to prevent voltage spikes.
Final validation requires a helper to observe bulb operation while you cycle the lever. Document any deviations from expected behavior: dim bulbs indicate high resistance, erratic flashing suggests loose connections. Retrace steps if anomalies persist.
Decoding Harness Colors and Roles in the Indicator Control Assembly
Locate the black wire with a thin white stripe–this carries the primary current from the fuse block to the lever mechanism. Trace it to the connector terminal marked “L” or “B+” to confirm continuity with a multimeter (should read ~12V when ignition is on). A common failure point occurs at crimp joints near the base of the stalk; inspect for corrosion or fraying before proceeding.
Examine the three yellow conductors (solid, single-stripe, and double-stripe) linking the lever to the front and rear lamps. Use the following reference to determine their routing:
- Solid yellow: rear left bulb
- Yellow with black stripe: front left marker
- Yellow with red stripe: front/rear parking lamp relay trigger
Probe each wire at the lamp socket while cycling the stalk–voltage should toggle between 0V and ~11.5V. Persistent low readings indicate a short in the harness near wheel wells, where chafing against the chassis is frequent.
Identify the brown wire with a colored tracer (typically blue or green) feeding into the hazard flasher unit. This circuit bypasses the stalk entirely during emergency activation; test by bridging the hazard button leads–both left and right lamps should pulse in unison. Verify the ground return (solid brown) at the nearest chassis point, ensuring resistance below 0.5Ω. Loose ground connections create erratic behavior, particularly at higher ambient temperatures.
Check the grey wire (solid or with a white stripe) exiting the lever toward the automatic cancelling cam. If equipped with cruise control, this same conductor may split to the speed sensor relay. Use a test light at the lever connector while turning the steering wheel–momentary contact confirms proper cam engagement. Replace the entire stalk if the cam fails to reset or if the wire exhibits internal breaks under flex testing.
Identifying and Resolving Frequent Lehcar Indicator Lever Problems
If lever contacts corrode, clean them with 600-grit sandpaper or a fiberglass pen–never use steel wool, as particles embed and accelerate oxidation. For intermittent failures, spray electrical contact cleaner directly into the lever housing while cycling the stalk 20-30 times to dislodge debris; avoid WD-40, which leaves a conductive residue. Check the hazard flasher relay socket for heat damage or melted plastic–replace the relay first if it clicks weakly or not at all. When front or rear bulbs remain constantly lit, disconnect the lever harness and probe pins 2 (left feed) and 5 (right feed) on the 9-pin connector with a multimeter set to Ω; resistance above 1.5 Ω indicates corroded wires between the lever and the fusebox.
For patterns where one side blinks erratically, splice a 5A fuse upstream of the bulb circuit to isolate shorts without melting loom insulation–focus on the door hinge grommet area, where chafing commonly exposes copper strands against the chassis ground. If steering column shake disrupts the cancel cam, tighten the three 10mm mounting bolts to 25 ft-lbs in a star pattern; over-torque crushes the plastic cancellation ring. Always socket-test bulbs before condemning the stalk–filament cold resistance below 2.2 Ω suggests internal arcing, which loads the circuit bimetal element and causes irregular flashing.