The 1977 Saab 99 has 36 electrical switch & relay parts with verified fitment on this page — 10 part types and 10 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.
On the 1977 Saab 99, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Most of the listed parts are Oil Pressure Sender / Switch (11 parts), Brake Light Switch (6 parts) and Neutral Safety Switch / Range Sensor Relay (6 parts). The other 7 part types cover the remaining 13 parts.
The 1977 Saab 99 came with a single engine, the 2.0L L4, and every part is verified against it.
10 brands supply electrical switch & relay parts for the 1977 Saab 99, led by STANDARD MOTOR PRODUCTS (13 parts), WELLS (5 parts) and HELLA (5 parts), plus 7 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1977 Saab 99. 7 parts have it, including STANDARD MOTOR PRODUCTS SLS66 (Brake Light Switch) and STANDARD MOTOR PRODUCTS RY116 (Neutral Safety Switch / Range Sensor Relay). Each part number opens a page with every vehicle that part fits.
Back Up / Reverse Lamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | LS244 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Back Up / Reverse Lamp switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 1977 Saab 99 — STANDARD MOTOR PRODUCTS LS244.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP | SKSLS66 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | SLS66T | 🇺🇸 US 🇨🇦 CA | T-SeriesFunctions: Switch | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | SLS66 | 🇺🇸 US 🇨🇦 CA | Functions: Switch | View on Amazon |
| WELLS Popular | 1S5238 | 🇺🇸 US 🇨🇦 CA | Mounting Hardware Included: No | View on Amazon |
| HELLA | 004846001 | 🇺🇸 US 🇨🇦 CA | 2-Pin ConnectorBolted | View on Amazon |
| ROSTRA | 620014 | 🇺🇸 US 🇨🇦 CA | Connector Gender: Male | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
6 Brake Light Switch parts are listed for the 1977 Saab 99, from STANDARD MOTOR PRODUCTS, SKP, WELLS and 2 other brands. STANDARD MOTOR PRODUCTS SLS66 carries the "Popular" badge.
In the Economy grade, SKP and STANDARD MOTOR PRODUCTS supply 2 parts: the catalog's value-priced group. A representative part number is SKP SKSLS66.
The Standard Replacement section lists 4 options from STANDARD MOTOR PRODUCTS, WELLS, HELLA and 1 other brand — built to original-equipment specification. STANDARD MOTOR PRODUCTS SLS66 is listed in this group.
Part numbers include STANDARD MOTOR PRODUCTS SLS66, SKP SKSLS66 and STANDARD MOTOR PRODUCTS SLS66T, among others listed above.
Fuel Pump Cutoff Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | D1876D | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS | FV7 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Fuel Pump Cutoff switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 Fuel Pump Cutoff Switch parts are listed for the 1977 Saab 99, from ACDELCO and STANDARD MOTOR PRODUCTS.
This group includes ACDELCO D1876D and STANDARD MOTOR PRODUCTS FV7.
Headlamp Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | HP3810 | 🇺🇸 US 🇨🇦 CA | HandypackConnector Shape: Polygon | View on Amazon |
| STANDARD MOTOR PRODUCTS | S654 | 🇺🇸 US 🇨🇦 CA | Connector Shape: PolygonLength (In): 1 | View on Amazon |
| UNITED MOTOR PRODUCTS | CON123 | 🇺🇸 US 🇨🇦 CA | Terminal Gender: FemaleTerminal Type: Spade | View on Amazon |
This table covers the relays that control the Headlamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
3 Headlamp Relay parts are listed for the 1977 Saab 99, from STANDARD MOTOR PRODUCTS and UNITED MOTOR PRODUCTS.
This group includes STANDARD MOTOR PRODUCTS HP3810, STANDARD MOTOR PRODUCTS S654 and UNITED MOTOR PRODUCTS CON123.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1R1061 | 🇺🇸 US 🇨🇦 CA | Amperage Rating: 40 AConnector Gender: Male | View on Amazon |
This table covers the relays that control the Multi-Function circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
One part is listed for the 1977 Saab 99 — WELLS 1R1061.
Neutral Safety Switch / Range Sensor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | RY116 | 🇺🇸 US 🇨🇦 CA | Connector Quantity: 1Mounting Bracket Included: No | View on Amazon |
| WELLS Popular | 1R1061 | 🇺🇸 US 🇨🇦 CA | Amperage Rating: 40 AConnector Gender: Male | View on Amazon |
| ROSTRA | 600003 | 🇺🇸 US 🇨🇦 CA | Amperage Rating: 40 AmpereConnector Gender: Male | View on Amazon |
| ROSTRA | 600034 | 🇺🇸 US 🇨🇦 CA | Connector Gender: MaleMounting Bracket Included: YES | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY116T | 🇺🇸 US 🇨🇦 CA | T-SeriesConnector Shape: Square | View on Amazon |
| STANDARD MOTOR PRODUCTS | RY30T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
This table covers the relays that control the Neutral Safety Switch / Range Sensor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
6 Neutral Safety Switch / Range Sensor Relay parts for the 1977 Saab 99 come from 3 brands — STANDARD MOTOR PRODUCTS, ROSTRA and WELLS. The "Popular" part is STANDARD MOTOR PRODUCTS RY116.
This group includes STANDARD MOTOR PRODUCTS RY116, WELLS 1R1061 and ROSTRA 600003 and the remaining parts above.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PS12T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| HOLSTEIN | 2OPS0073 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS15T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| UNITED MOTOR PRODUCTS | OPS4 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | D8050 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | PS12 | 🇺🇸 US 🇨🇦 CA | with Gauge | View on Amazon |
| ACDELCO | C8020 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| BECK/ARNLEY | 2010023 | 🇺🇸 US 🇨🇦 CA | Contains Light | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS15 | 🇺🇸 US 🇨🇦 CA | Finish: Brass | View on Amazon |
| WELLS | 1S6649 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | OS3537 | 🇺🇸 US 🇨🇦 CA | Combi Switch Function: Normally Closed | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
11 Oil Pressure Sender / Switch parts are listed for the 1977 Saab 99, from STANDARD MOTOR PRODUCTS, ACDELCO, HOLSTEIN and 4 other brands. STANDARD MOTOR PRODUCTS PS12T carries the "Popular" badge.
Economy: 4 parts, from STANDARD MOTOR PRODUCTS, HOLSTEIN and UNITED MOTOR PRODUCTS. A representative part number is STANDARD MOTOR PRODUCTS PS12T.
The Standard Replacement section: 6 options from ACDELCO, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 1 other brand. ACDELCO D8050 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Radiator Fan Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 750025 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1S4391 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Radiator Fan switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 Radiator Fan Switch parts are listed for the 1977 Saab 99, from ROSTRA and WELLS.
Listed part numbers: ROSTRA 750025 and WELLS 1S4391.
Wiper Motor Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332541 | 🇺🇸 US 🇨🇦 CA | 4-Pin ConnectorPlug: B | View on Amazon |
| HELLA | 933332641 | 🇺🇸 US 🇨🇦 CA | 5-Pin ConnectorColor: Black, Gray | View on Amazon |
This table covers the relays that control the Wiper Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
HELLA supplies both parts for the 1977 Saab 99.
Part numbers include HELLA 933332541 and HELLA 933332641.
Wiring Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 933332541 | 🇺🇸 US 🇨🇦 CA | 4-Pin ConnectorPlug: B | View on Amazon |
| HELLA | 933332641 | 🇺🇸 US 🇨🇦 CA | 5-Pin ConnectorColor: Black, Gray | View on Amazon |
This table covers the relays that control the Wiring circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
HELLA supplies both parts for the 1977 Saab 99.
Part numbers include HELLA 933332541 and HELLA 933332641.
Buying Electrical Switch & Relay Parts for a 1977 Saab 99
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 2.0L L4 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Pressure Sender / Switch and Brake Light Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1977 Saab 99?
Our catalog currently lists 36 electrical switch & relay parts for the 1977 Saab 99 across 10 subcategories and 10 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 1977 Saab 99?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1977 Saab 99 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1977 Saab 99?
Every part on this page is matched to the 2.0L L4 engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1977 Saab 99
Electrical Switch & Relay Parts for Other Saab 99 Years
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