This is a collection of documents I put together to help me with wiring my car. It is based on the Haynes manual for early base model Sierras, and uses the Haynes reference as a way of linking multiple items (e.g. the individual wires to the instrument multiplug)
| No. | Relay | |||||||
| 1 | I | Driving Lamps | W/R | W | ||||
| 2 | II | Fog Lamps | Bk | W | Bk/Y | S/Bk | ||
| 3 | III | Heated rear window | Bk | Bk | Bn | Bk/B | ||
| 4 | IV | Auto gearbox inhibitor | Bk | Bk/B | Bn/W | |||
| 5 | V | Horn | R | Bn/W | R | Only fitted with centre push horn switch | ||
| 6 | VI | Dip beam | present | R/B | Y | Y | B | |
| 7 | VII | Ignition | present | B/W | R/B | B | Bk powers F1-5 bus | |
| 8 | VIII | Headlamp wash | present | B/Y | Y | B | B | |
| 9 | IX | Seat belt warning | present | B/W | B/W link | B/W | Doesn't match Bn,Bn/Gn,Bk/Y shown in manual | |
| 10 | X | Wipers | present | Bn/Y | Bn/W | Bn/Gn | Bk/Y | |
| Flasher relay | present | Bk/R | Bn | Bk/W | ||||
| There are 2 main relay buses - power between 1,2,4,&5, and Earth between 7 - 10 | ||||||||
| No. | Size | Fuse | ||||||
| 3 | 10 | Wipers | ||||||
| 4 | 30 | Heater, Windscreen washers | ||||||
| 8 | 10 | |||||||
| 9 | 15 | Flasher,stop,reversing lamp | ||||||
| 13 | 10 | Hazard warning,Horn | ||||||
| 14 | 10 | LH High beam | ||||||
| 15 | 10 | RH High beam | ||||||
| 16 | 10 | LH Dip beam,rear fog | ||||||
| 17 | 10 | RH Dip beam | ||||||
| 18 | 10 | LH side, license | ||||||
| 19 | 10 | RH side |
| Rear Lights | ||||||||
| 92 | Rear LH Indicator | Bk/W | mini windscreen wipers | |||||
| 92 | Rear LH tail | S/Bk | Sierra | Mini | ||||
| 92 | Rear LH Stop | Bk/R | ||||||
| 92 | Rear LH Reversing light | Bk | ||||||
| 92 | Rear LH Fog | Y/R | ||||||
| 93 | Rear RH Indicator | Bk/Gn | ||||||
| 93 | Rear RH tail | S/R | ||||||
| 93 | Rear RH Stop | Bk/R | ||||||
| 93 | Rear RH Reversing light | Bk | ||||||
| 93 | Rear RH Fog | Y/R | ||||||
| pairs joined at offside | Bk/R | Bk | Y/R | |||||
| Instrument cluster | ||||||||
| 82 | Ignition warning | B | ||||||
| 82 | Seat belt warning | Bk/W | ||||||
| 82 | Panel light earth | Bn | ||||||
| 82 | Main beam warning | Bk/W | ||||||
| 82 | Fuel gauge | Bk/Y | ||||||
| 82 | Brake warning | Bn/Gn | ||||||
| 82 | Oil warning | Bn/Y | ||||||
| 82 | Fuel gauge | Bn/Bk | ||||||
| 82 | Panel light | S/Y | ||||||
| 82 | Temperature gauge | Bn | ||||||
| 82 | Temperature gauge | Bn/W | ||||||
| 82 | Indicator warning | Bk/Gn | ||||||
| 82 | Indicator warning | Bk/W | ||||||
| Multifunction Switch | ||||||||
| 102 | Horn | R/Y | ||||||
| 102 | Horn | R/Y | ||||||
| 102 | Flasher L | Bk/W | ||||||
| 102 | Flasher common | Bk/W/Gn | ||||||
| 102 | Flasher R | Bk/Gn | ||||||
| 102 | Hazard warning | Bk/R | ||||||
| 102 | Hazard warning | Bk | ||||||
| 102 | Lights | Bk/Bn | ||||||
| 102 | Lights | W/Bk | ||||||
| 102 | Lights | Y | ||||||
| 102 | Lights | W | ||||||
| 102 | other | Bk/B | ||||||
| Warning Lamp | ||||||||
| 116 | 1 | Bk/R | ||||||
| 116 | 2 Brake wear | Bn/Y | ||||||
| 116 | 3 Low coolant | Bn/R | ||||||
| 116 | 4 Low washer | Bn/W | ||||||
| 116 | 5 Low oil | Bn/Bk | ||||||
| 116 | 6 Low fuel | Bn/Gn | ||||||
| 116 | 7 Seat belt warning | Bn/Gn | ||||||
(colour code to device)
| B | Alternator | 1 |
| B | Ignition Relay | 80 |
| B | Dip Beam relay | 24 |
| B | Ignition warning | 82 |
| B/W | Elec choke | 33 |
| B/W | Ignition Relay | 80 |
| B/W | Alternator | 1 |
| Bk | Inhibitor relay | 3 |
| Bk | Light / wiper switch | 94 |
| Bk | Washer switch | 118 |
| Bk | Battery | 9 |
| Bk | Elec ignition | 42 |
| Bk | Rear LH Reversing light | 92 |
| Bk | Rear RH Reversing light | 93 |
| Bk | Hazard warning | 102 |
| Bk/B | Washer switch | 118 |
| Bk/B | Inhibitor relay | 3 |
| Bk/B | Ignition switch | 81 |
| Bk/B | other | 102 |
| Bk/Bn | Lights | 102 |
| Bk/Gn | RH front indicator | 48 |
| Bk/Gn | RH front indicator repeater | 49 |
| Bk/Gn | Wiper relay | 120 |
| Bk/Gn | Elec ignition | 42 |
| Bk/Gn | Rear RH Indicator | 93 |
| Bk/Gn | Indicator warning | 82 |
| Bk/Gn | Flasher R | 102 |
| Bk/R | Distributor | 25 |
| Bk/R | Elec ignition | 42 |
| Bk/R | Flasher relay | 50 |
| Bk/R | Heater blower motor | 73 |
| Bk/R | Heater blower switch | 74 |
| Bk/R | Starter Motor | 109 |
| Bk/R | Stop lamp switch | 110 |
| Bk/R | Stop lamp switch | 110 |
| Bk/R | Rear LH Stop | 92 |
| Bk/R | Rear RH Stop | 93 |
| Bk/R | Hazard warning | 102 |
| Bk/R | 1 | 116 |
| Bk/W | LH front indicator | 46 |
| Bk/W | LH front indicator repeater | 47 |
| Bk/W | Flasher relay | 50 |
| Bk/W | Rear LH Indicator | 92 |
| Bk/W | Seta belt warning | 82 |
| Bk/W | Main beam warning | 82 |
| Bk/W | Indicator warning | 82 |
| Bk/W | Flasher L | 102 |
| Bk/W/Gn | Flasher common | 102 |
| Bk/Y | Ignition switch | 81 |
| Bk/Y | Wiper relay | 120 |
| Bk/Y | Wiper speed control | 122 |
| Bk/Y | Wiper Motor | 123 |
| Bk/Y | Fuel gauge | 82 |
| Bk/Y/R->BK/B | Heater blower switch | 74 |
| Bn | Low brake fluid warning | 95 |
| Bn | Low washer fluid warning | 98 |
| Bn | Temperature sensor | 23 |
| Bn | LH front indicator | 46 |
| Bn | LH front indicator repeater | 47 |
| Bn | RH front indicator | 48 |
| Bn | RH front indicator repeater | 49 |
| Bn | Flasher relay | 50 |
| Bn | Heater blower lamp | 72 |
| Bn | Horn switch | 77 |
| Bn | Number plate light | 91 |
| Bn | Elec ignition | 42 |
| Bn | Wiper speed control | 122 |
| Bn | LH headlight | 63 |
| Bn | RH headlight | 64 |
| Bn | Wiper Motor | 123 |
| Bn | Heater blower switch | 74 |
| Bn | Panel light earth | 82 |
| Bn | Temperature gauge | 82 |
| Bn/Bk | Fuel gauge | 82 |
| Bn/Bk | 5 Low oil | 116 |
| Bn/Gn | Temperature sensor | 23 |
| Bn/Gn | Fuel sender | 58 |
| Bn/Gn | Handbrake warning | 62 |
| Bn/Gn | Oil pressure warning | 103 |
| Bn/Gn | Heater blower motor | 73 |
| Bn/Gn | Heater blower switch | 74 |
| Bn/Gn | Low brake fluid warning | 95 |
| Bn/Gn | Brake warning | 82 |
| Bn/Gn | 6 Low fuel | 116 |
| Bn/Gn | 7 Seat belt warning | 116 |
| Bn/R | 3 Low coolant | 116 |
| Bn/W | Horn switch | 77 |
| Bn/W | Horn relay | 76 |
| Bn/W | Low washer fluid warning | 98 |
| Bn/W | Oil pressure warning | 103 |
| Bn/W | Inhibitor relay | 3 |
| Bn/W | Wiper relay | 120 |
| Bn/W | Wiper Motor | 123 |
| Bn/W | Temperature gauge | 82 |
| Bn/W | 4 Low washer | 116 |
| Bn/Y | Heater blower motor | 73 |
| Bn/Y | Heater blower switch | 74 |
| Bn/Y | Low brake fluid warning | 95 |
| Bn/Y | Wiper relay | 120 |
| Bn/Y | Oil warning | 82 |
| Bn/Y | 2 Brake wear | 116 |
| Gn | Coil | 79 |
| Gn | Coil | 79 |
| Gn | Wiper Motor | 123 |
| Gn | Elec ignition | 42 |
| Gn/Y | Distributor | 25 |
| Gn/Y | Elec ignition | 42 |
| R | Alternator | 1 |
| R | Horn relay | 76 |
| R | Alternator | 1 |
| R | Battery | 9 |
| R | Starter Motor | 109 |
| R | Wiper Motor | 123 |
| R | Horn relay | 76 |
| R | Ignition switch | 81 |
| R | Light / wiper switch | 94 |
| R(fused) | Battery | 9 |
| R/B | Dip Beam relay | 24 |
| R/B | Ignition Relay | 80 |
| R/Y | Horn | 75 |
| R/Y | Horn | 102 |
| R/Y | Horn | 102 |
| S | Number plate light | 91 |
| S | Light / wiper switch | 94 |
| S/Bk | LH headlight | 63 |
| S/Bk | Rear LH tail | 92 |
| S/Gn | Heater blower lamp | 72 |
| S/R | RH headlight | 64 |
| S/R | Rear RH tail | 93 |
| S/Y | Wiper speed control | 122 |
| S/Y | Panel light | 82 |
| W | LH headlight | 63 |
| W | RH headlight | 64 |
| W | LH headlight | 63 |
| W | RH headlight | 64 |
| W | Lights | 102 |
| W/Bk | Light / wiper switch | 94 |
| W/Bk | Lights | 102 |
| Y | Dip Beam relay | 24 |
| Y | Dip Beam relay | 24 |
| Y | LH headlight | 63 |
| Y | RH headlight | 64 |
| Y | Lights | 102 |
| Y/R | Rear LH Fog | 92 |
| Y/R | Rear RH Fog | 93 |
