Mod Description
The ZEE unit is the fuse and relay module that is used in 600cc smarts instead of the SAM unit that is found in 700cc smarts.Mod Details
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Mod ID545
CreditEvilution
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Linkhttps://www.evilution.co.uk/mod/zee-unit-fuse-box.htm Copy to ClipboardThe ZEE Unit
ZEE unit stands for Zentrale Einschub Elektrik which translated means Central Electric Module.
The ZEE unit is the 600cc version of the SAM unit. It carries the fuses in very much the same way but the relays are all external so can be swapped over.
Where the 700cc SAM unit is one part, the ZEE unit comprises of 3 sections.
Fuses, OBD and partial relay holder.
ZEE insert module that controls the electronics.
Secondary fuse and relay box located under the seat.
Removing And Opening The ZEE Unit
The main ZEE connector (outlined red), if your car is doing strange things, check this isn’t loose.
The ZEE insert slides out of the side.
The insert fully removed. Circled in yellow is the small speaker that makes all the beeping noises.
Surrounding the unit are plastic tabs, these are easy to unclip.
With all of the clips undone you can remove the top to reveal the cicuit board.
This is as far as you can get with viewing the ZEE insert, the rear plastic housing cannot be removed without damaging something. Highlighted in blue is the outline of relays L and M which are located on the other side of the ZEE insert circuit board. These cannot be removed or changed unlike the other relays.
Todor T cut a hole in a ZEE unit to show us the relay. (2 relays in 1 package).
Main Fuse And Relay Holder
Located under the dashboard. The fuse ratings and layout can be found here.
From 16/11/1999
| Relay | Coupe Function |
| A | Front fog lights |
| B | Boot solenoid |
| C | Rear wiper interval |
| D | Horn |
| E | Relief for igntion, heater and windows |
| F | Rear window heater |
| G | Front coolant and AC fan |
| H | Left turn indicator |
| I | Right turn indicator |
| K | Front wiper interval |
| L | Central locking (inside ZEE unit) |
| M | Central locking (inside ZEE unit) |
| Relay | Cabrio Function |
| A | Front fog lights |
| B | Soft top open |
| C | Soft top close |
| D | Horn |
| E | Relief for igntion, heater and windows |
| F | Boot solenoid |
| G | Front coolant and AC fan |
| H | Left turn indicator |
| I | Right turn indicator |
| K | Front wiper interval |
| L | Central locking (inside ZEE unit) |
| M | Central locking (inside ZEE unit) |
Depending when your car was made, you could have hidden headlight relays or none at all., read further down.
Up to 15/11/1999
| Relay | Coupe Function |
| A | Front fog lights |
| B | Central Locking Locked |
| C | Central Locking Open |
| D | NA |
| E | Rear Hatch Remote Unlocking |
| F | Rear window heater |
| G | Front coolant and AC fan |
| H | Left turn indicator |
| I | Right turn indicator |
| K | Front wiper interval |
The wipers and horn relays are often separate from the ZEE, they are hidden behind the dash. Usually behind the speedo or the stereo.
Headlight Relays?
This only applies to 600cc smarts made from 2002 onwards.
For some odd reason, smart decided to put the headlight relays elsewhere. On a right hand drive smart, the relays are hidden behind the stereo. On a left hand drive smart, the relays are behind the main instrument cluster. If your 600cc smart was made before 2002, there were no relays for the headlights.