Difference between revisions of "Relays"
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| − | As a key part of the [[Loom]], a number of relays are fitted to various parts of your [[Electrical]] system. | + | As a key part of the [[Loom]], a number of relays are fitted to various parts of your [[Electrical]] system. The most important relays, K1-K10, are located inside the [[Fuse_Box|Fuse Box]]. |
The basic idea of a relay is an electromagnetic switch, which sits between two circuits; an input circuit and an output circuit. On the most basic relays, turning on the input circuit will also turn on the output circuit. In this way, small, low-power wires can go to all the controls in the car, and the big dangerous high-power wires can stay out of harms way. | The basic idea of a relay is an electromagnetic switch, which sits between two circuits; an input circuit and an output circuit. On the most basic relays, turning on the input circuit will also turn on the output circuit. In this way, small, low-power wires can go to all the controls in the car, and the big dangerous high-power wires can stay out of harms way. | ||
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But relays can do more than that. Sometimes turning on the input circuit turns off the output circuit, or even switches between two different outputs, turning very simple controls into much more complicated wiring puzzles. | But relays can do more than that. Sometimes turning on the input circuit turns off the output circuit, or even switches between two different outputs, turning very simple controls into much more complicated wiring puzzles. | ||
| − | Because of this, the relay can sometimes cause problems in a circuit. Knowing where the relay is will be the first step in curing the problem, so here's a map to all the relays fitted to your E30: | + | Because of this, the relay can sometimes cause problems in a circuit. Knowing where the relay is will be the first step in curing the problem, so here's a map to all the relays fitted to your E30, outside the fuse box: |
| − | {|class="wikitable" | + | {|class="wikitable" align="center" |
!Function | !Function | ||
!Relay | !Relay | ||
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|27 | |27 | ||
|} | |} | ||
| + | |||
| + | [[Image:RelaysECU-Fuel-E30E28-6001.jpg|center]] | ||
Latest revision as of 16:19, 12 January 2012
As a key part of the Loom, a number of relays are fitted to various parts of your Electrical system. The most important relays, K1-K10, are located inside the Fuse Box.
The basic idea of a relay is an electromagnetic switch, which sits between two circuits; an input circuit and an output circuit. On the most basic relays, turning on the input circuit will also turn on the output circuit. In this way, small, low-power wires can go to all the controls in the car, and the big dangerous high-power wires can stay out of harms way.
But relays can do more than that. Sometimes turning on the input circuit turns off the output circuit, or even switches between two different outputs, turning very simple controls into much more complicated wiring puzzles.
Because of this, the relay can sometimes cause problems in a circuit. Knowing where the relay is will be the first step in curing the problem, so here's a map to all the relays fitted to your E30, outside the fuse box:
| Function | Relay | Location |
|---|---|---|
| Headlight Cleaners | 1 | 
|
| Intensive Cleaning | 2 | |
| DME | 3 | |
| Cruise Control | 4 | |
| Idle Speed | 5 | |
| Ignition Advance | 6 | |
| Igntion Control | 7 | |
| Fuel Pump | 8 | |
| Oxygen Sensor heating | 9 | |
| AC Blower | 10 | |
| AC | 11 | |
| Flashing relay | 12 | |
| ABS Overvoltage | 13 | |
| ABS Control | 14 | |
| Hydraulic Control | 15 | |
| Valve relay | 16 | |
| Motor relay | 17 | |
| Ignition advance (up to 1987) | 18 | |
| Idle stabilisation | 19 | |
| L-Jetronic Master relay | 20 | |
| Alarm system relay | 21 | |
| Power Window relay | 22 | |
| Starter interlocking relay | 23 | |
| Central Locking | 24 | |
| Inside Light Delay | 25 | |
| Bulb tester for check control | 26 | |
| Independent electronic
transmission conrtrol |
27 |
